ath9k: improve noise immunity behavior for older chipsets (ar92xx and earlier), shoul...

[openwrt/staging/chunkeey.git] / package / kernel / mac80211 / patches / 300-pending_work.patch

commit 1abdeca3c6fb9cf1f84f85e78ed8d1c33bd69db0
Author: Felix Fietkau <nbd@openwrt.org>
Date:   Fri Feb 28 18:52:56 2014 +0100

    ath9k_hw: tweak noise immunity thresholds for older chipsets
    
    Older chipsets are more sensitive to high PHY error counts, and the
    current noise immunity thresholds were based on tests run at QCA with
    newer chipsets.
    
    This patch brings back the values from the old ANI implementation for
    old chipsets, and it also disables weak signal detection on an earlier
    noise immunity level, to improve overall radio stability on affected
    devices.
    
    Signed-off-by: Felix Fietkau <nbd@openwrt.org>

commit 431e506da5953adc3b65af25f4b90873d528c115
Author: Felix Fietkau <nbd@openwrt.org>
Date:   Fri Feb 28 18:44:13 2014 +0100

    ath9k_hw: toggle weak signal detection in AP mode on older chipsets
    
    The commit 80b4205b "ath9k: Fix OFDM weak signal detection for AP mode"
    prevented weak signal detection changes from taking effect in AP mode on
    all chipsets, claiming it is "not allowed".
    
    The main reason for not disabling weak signal detection in AP mode is
    that typically beacon RSSI is used to track whether it is needed to
    boost range, and this is unavailable in AP mode for obvious reasons.
    
    The problem with not disabling weak signal detection is that older
    chipsets are very sensitive to high PHY error counts. When faced with
    heavy noise, this can lead to an excessive amount of "Failed to stop
    TX DMA" errors in the field.
    
    Signed-off-by: Felix Fietkau <nbd@openwrt.org>

commit 98d1a6c5b14688ed030e81b889f607be308e0df9
Author: Felix Fietkau <nbd@openwrt.org>
Date:   Mon Feb 24 22:20:32 2014 +0100

    ath9k: fix invalid descriptor discarding
    
    Only set sc->rx.discard_next to rx_stats->rs_more when actually
    discarding the current descriptor.
    
    Also, fix a detection of broken descriptors:
    First the code checks if the current descriptor is not done.
    Then it checks if the next descriptor is done.
    Add a check that afterwards checks the first descriptor again, because
    it might have been completed in the mean time.
    
    This fixes a regression introduced in
    commit 723e711356b5a8a95728a890e254e8b0d47b55cf
    "ath9k: fix handling of broken descriptors"
    
    Cc: stable@vger.kernel.org
    Reported-by: Marco André Dinis <marcoandredinis@gmail.com>
    Signed-off-by: Felix Fietkau <nbd@openwrt.org>

commit 52a46300e782fe6994466523eb2b0b59091ea59f
Author: Felix Fietkau <nbd@openwrt.org>
Date:   Mon Feb 24 11:43:50 2014 +0100

    ath9k: reduce baseband hang detection false positive rate
    
    Check if the baseband state remains stable, and add a small delay
    between register reads.
    
    Signed-off-by: Felix Fietkau <nbd@openwrt.org>

commit 118945bb12082e9d4edddc868d88143164e0f440
Author: Felix Fietkau <nbd@openwrt.org>
Date:   Sat Feb 22 14:55:23 2014 +0100

    ath5k: set SURVEY_INFO_IN_USE on get_survey
    
    Only one channel is returned - the one currently being used.
    
    Signed-off-by: Felix Fietkau <nbd@openwrt.org>

commit ee41f72476e1ea44283dfe1cbf75b9543a1e15c8
Author: Felix Fietkau <nbd@openwrt.org>
Date:   Sat Feb 22 14:44:52 2014 +0100

    ath9k: make some hardware reset log messages debug-only
    
    On some chips, baseband watchdog hangs are more common than others, and
    the driver has support for handling them.
    Interrupts even after a watchdog hang are also quite common, so there's
    not much point in spamming the user's logfiles.
    
    Signed-off-by: Felix Fietkau <nbd@openwrt.org>

commit b14fbb554fc65a2e0b5c41a319269b0350f187e7
Author: Felix Fietkau <nbd@openwrt.org>
Date:   Sat Feb 22 14:35:25 2014 +0100

    ath9k: do not set half/quarter channel flags in AR_PHY_MODE
    
    5/10 MHz channel bandwidth is configured via the PLL clock, instead of
    the AR_PHY_MODE register. Using that register is AR93xx specific, and
    makes the mode incompatible with earlier chipsets.
    
    In some early versions, these flags were apparently applied at the wrong
    point in time and thus did not cause connectivity issues, however now
    they are causing problems, as pointed out in this OpenWrt ticket:
    
    https://dev.openwrt.org/ticket/14916
    
    Signed-off-by: Felix Fietkau <nbd@openwrt.org>

commit 0f1cb7be2551b30b02cd54c897e0e29e483cfda5
Author: Felix Fietkau <nbd@openwrt.org>
Date:   Sat Feb 22 13:43:29 2014 +0100

    ath9k: fix ps-poll responses under a-mpdu sessions
    
    When passing tx frames to the U-APSD queue for powersave poll responses,
    the ath_atx_tid pointer needs to be passed to ath_tx_setup_buffer for
    proper sequence number accounting.
    
    This fixes high latency and connection stability issues with ath9k
    running as AP and a few kinds of mobile phones as client, when PS-Poll
    is heavily used
    
    Cc: stable@vger.kernel.org
    Signed-off-by: Felix Fietkau <nbd@openwrt.org>

commit d5d87a37bbd6066b2c3c5d0bd0fe2a6e2ea45cc5
Author: Felix Fietkau <nbd@openwrt.org>
Date:   Fri Feb 21 11:39:59 2014 +0100

    ath9k: list more reset causes in debugfs
    
    Number of MAC hangs and stuck beacons were missing
    
    Signed-off-by: Felix Fietkau <nbd@openwrt.org>

commit d84856012e0f10fe598a5ad3b7b869397a089e07
Author: Johannes Berg <johannes.berg@intel.com>
Date:   Thu Feb 20 11:19:58 2014 +0100

    mac80211: fix station wakeup powersave race
    
    Consider the following (relatively unlikely) scenario:
     1) station goes to sleep while frames are buffered in driver
     2) driver blocks wakeup (until no more frames are buffered)
     3) station wakes up again
     4) driver unblocks wakeup
    
    In this case, the current mac80211 code will do the following:
     1) WLAN_STA_PS_STA set
     2) WLAN_STA_PS_DRIVER set
     3) - nothing -
     4) WLAN_STA_PS_DRIVER cleared
    
    As a result, no frames will be delivered to the client, even
    though it is awake, until it sends another frame to us that
    triggers ieee80211_sta_ps_deliver_wakeup() in sta_ps_end().
    
    Since we now take the PS spinlock, we can fix this while at
    the same time removing the complexity with the pending skb
    queue function. This was broken since my commit 50a9432daeec
    ("mac80211: fix powersaving clients races") due to removing
    the clearing of WLAN_STA_PS_STA in the RX path.
    
    While at it, fix a cleanup path issue when a station is
    removed while the driver is still blocking its wakeup.
    
    Signed-off-by: Johannes Berg <johannes.berg@intel.com>

commit 798f2786602cbe93e6b928299614aa36ebf50692
Author: Johannes Berg <johannes.berg@intel.com>
Date:   Mon Feb 17 20:49:03 2014 +0100

    mac80211: insert stations before adding to driver
    
    There's a race condition in mac80211 because we add stations
    to the internal lists after adding them to the driver, which
    means that (for example) the following can happen:
     1. a station connects and is added
     2. first, it is added to the driver
     3. then, it is added to the mac80211 lists
    
    If the station goes to sleep between steps 2 and 3, and the
    firmware/hardware records it as being asleep, mac80211 will
    never instruct the driver to wake it up again as it never
    realized it went to sleep since the RX path discarded the
    frame as a "spurious class 3 frame", no station entry was
    present yet.
    
    Fix this by adding the station in software first, and only
    then adding it to the driver. That way, any state that the
    driver changes will be reflected properly in mac80211's
    station state. The problematic part is the roll-back if the
    driver fails to add the station, in that case a bit more is
    needed. To not make that overly complex prevent starting BA
    sessions in the meantime.
    
    Signed-off-by: Johannes Berg <johannes.berg@intel.com>

commit b9ba6a520cb07ab3aa7aaaf9ce4a0bc7a6bc06fe
Author: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Date:   Thu Feb 20 09:22:11 2014 +0200

    mac80211: fix AP powersave TX vs. wakeup race
    
    There is a race between the TX path and the STA wakeup: while
    a station is sleeping, mac80211 buffers frames until it wakes
    up, then the frames are transmitted. However, the RX and TX
    path are concurrent, so the packet indicating wakeup can be
    processed while a packet is being transmitted.
    
    This can lead to a situation where the buffered frames list
    is emptied on the one side, while a frame is being added on
    the other side, as the station is still seen as sleeping in
    the TX path.
    
    As a result, the newly added frame will not be send anytime
    soon. It might be sent much later (and out of order) when the
    station goes to sleep and wakes up the next time.
    
    Additionally, it can lead to the crash below.
    
    Fix all this by synchronising both paths with a new lock.
    Both path are not fastpath since they handle PS situations.
    
    In a later patch we'll remove the extra skb queue locks to
    reduce locking overhead.
    
    BUG: unable to handle kernel
    NULL pointer dereference at 000000b0
    IP: [<ff6f1791>] ieee80211_report_used_skb+0x11/0x3e0 [mac80211]
    *pde = 00000000
    Oops: 0000 [#1] SMP DEBUG_PAGEALLOC
    EIP: 0060:[<ff6f1791>] EFLAGS: 00210282 CPU: 1
    EIP is at ieee80211_report_used_skb+0x11/0x3e0 [mac80211]
    EAX: e5900da0 EBX: 00000000 ECX: 00000001 EDX: 00000000
    ESI: e41d00c0 EDI: e5900da0 EBP: ebe458e4 ESP: ebe458b0
     DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
    CR0: 8005003b CR2: 000000b0 CR3: 25a78000 CR4: 000407d0
    DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
    DR6: ffff0ff0 DR7: 00000400
    Process iperf (pid: 3934, ti=ebe44000 task=e757c0b0 task.ti=ebe44000)
    iwlwifi 0000:02:00.0: I iwl_pcie_enqueue_hcmd Sending command LQ_CMD (#4e), seq: 0x0903, 92 bytes at 3[3]:9
    Stack:
     e403b32c ebe458c4 00200002 00200286 e403b338 ebe458cc c10960bb e5900da0
     ff76a6ec ebe458d8 00000000 e41d00c0 e5900da0 ebe458f0 ff6f1b75 e403b210
     ebe4598c ff723dc1 00000000 ff76a6ec e597c978 e403b758 00000002 00000002
    Call Trace:
     [<ff6f1b75>] ieee80211_free_txskb+0x15/0x20 [mac80211]
     [<ff723dc1>] invoke_tx_handlers+0x1661/0x1780 [mac80211]
     [<ff7248a5>] ieee80211_tx+0x75/0x100 [mac80211]
     [<ff7249bf>] ieee80211_xmit+0x8f/0xc0 [mac80211]
     [<ff72550e>] ieee80211_subif_start_xmit+0x4fe/0xe20 [mac80211]
     [<c149ef70>] dev_hard_start_xmit+0x450/0x950
     [<c14b9aa9>] sch_direct_xmit+0xa9/0x250
     [<c14b9c9b>] __qdisc_run+0x4b/0x150
     [<c149f732>] dev_queue_xmit+0x2c2/0xca0
    
    Cc: stable@vger.kernel.org
    Reported-by: Yaara Rozenblum <yaara.rozenblum@intel.com>
    Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
    Reviewed-by: Stanislaw Gruszka <sgruszka@redhat.com>
    [reword commit log, use a separate lock]
    Signed-off-by: Johannes Berg <johannes.berg@intel.com>

commit 80e419de0dff38436b30d363311c625766193f86
Author: Inbal Hacohen <Inbal.Hacohen@intel.com>
Date:   Wed Feb 12 09:32:27 2014 +0200

    cfg80211: bugfix in regulatory user hint process
    
    After processing hint_user, we would want to schedule the
    timeout work only if we are actually waiting to CRDA. This happens
    when the status is not "IGNORE" nor "ALREADY_SET".
    
    Signed-off-by: Inbal Hacohen <Inbal.Hacohen@intel.com>
    Signed-off-by: Johannes Berg <johannes.berg@intel.com>

commit 6514c93afede55284e2cb63359aadedb85884c80
Author: Jouni Malinen <jouni@qca.qualcomm.com>
Date:   Tue Feb 18 20:41:08 2014 +0200

    ath9k: Enable U-APSD AP mode support
    
    mac80211 handles the actual operations, so ath9k can just indicate
    support for this. Based on initial tests, this combination seems to
    work fine.
    
    Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>

commit a63caf0a357ad5c1f08d6b7827dc76c451445017
Author: Stanislaw Gruszka <sgruszka@redhat.com>
Date:   Wed Feb 19 13:15:17 2014 +0100

    ath9k: protect tid->sched check
    
    We check tid->sched without a lock taken on ath_tx_aggr_sleep(). That
    is race condition which can result of doing list_del(&tid->list) twice
    (second time with poisoned list node) and cause crash like shown below:
    
    [424271.637220] BUG: unable to handle kernel paging request at 00100104
    [424271.637328] IP: [<f90fc072>] ath_tx_aggr_sleep+0x62/0xe0 [ath9k]
    ...
    [424271.639953] Call Trace:
    [424271.639998]  [<f90f6900>] ? ath9k_get_survey+0x110/0x110 [ath9k]
    [424271.640083]  [<f90f6942>] ath9k_sta_notify+0x42/0x50 [ath9k]
    [424271.640177]  [<f809cfef>] sta_ps_start+0x8f/0x1c0 [mac80211]
    [424271.640258]  [<c10f730e>] ? free_compound_page+0x2e/0x40
    [424271.640346]  [<f809e915>] ieee80211_rx_handlers+0x9d5/0x2340 [mac80211]
    [424271.640437]  [<c112f048>] ? kmem_cache_free+0x1d8/0x1f0
    [424271.640510]  [<c1345a84>] ? kfree_skbmem+0x34/0x90
    [424271.640578]  [<c10fc23c>] ? put_page+0x2c/0x40
    [424271.640640]  [<c1345a84>] ? kfree_skbmem+0x34/0x90
    [424271.640706]  [<c1345a84>] ? kfree_skbmem+0x34/0x90
    [424271.640787]  [<f809dde3>] ? ieee80211_rx_handlers_result+0x73/0x1d0 [mac80211]
    [424271.640897]  [<f80a07a0>] ieee80211_prepare_and_rx_handle+0x520/0xad0 [mac80211]
    [424271.641009]  [<f809e22d>] ? ieee80211_rx_handlers+0x2ed/0x2340 [mac80211]
    [424271.641104]  [<c13846ce>] ? ip_output+0x7e/0xd0
    [424271.641182]  [<f80a1057>] ieee80211_rx+0x307/0x7c0 [mac80211]
    [424271.641266]  [<f90fa6ee>] ath_rx_tasklet+0x88e/0xf70 [ath9k]
    [424271.641358]  [<f80a0f2c>] ? ieee80211_rx+0x1dc/0x7c0 [mac80211]
    [424271.641445]  [<f90f82db>] ath9k_tasklet+0xcb/0x130 [ath9k]
    
    Bug report:
    https://bugzilla.kernel.org/show_bug.cgi?id=70551
    
    Reported-and-tested-by: Max Sydorenko <maxim.stargazer@gmail.com>
    Cc: stable@vger.kernel.org
    Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>

commit 82ed9e3ccc02797df2ffe4b78127c4cd5f799a41
Author: Felix Fietkau <nbd@openwrt.org>
Date:   Tue Feb 11 15:54:13 2014 +0100

    mac80211: send control port protocol frames to the VO queue
    
    Improves reliability of wifi connections with WPA, since authentication
    frames are prioritized over normal traffic and also typically exempt
    from aggregation.
    
    Cc: stable@vger.kernel.org
    Signed-off-by: Felix Fietkau <nbd@openwrt.org>

commit d4426800f71e972feaa33e04c5801fc730627bdd
Author: Stanislaw Gruszka <stf_xl@wp.pl>
Date:   Mon Feb 10 22:38:28 2014 +0100

    rtl8187: fix regression on MIPS without coherent DMA
    
    This patch fixes regression caused by commit a16dad77634 "MIPS: Fix
    potencial corruption". That commit fixes one corruption scenario in
    cost of adding another one, which actually start to cause crashes
    on Yeeloong laptop when rtl8187 driver is used.
    
    For correct DMA read operation on machines without DMA coherence, kernel
    have to invalidate cache, such it will refill later with new data that
    device wrote to memory, when that data is needed to process. We can only
    invalidate full cache line. Hence when cache line includes both dma
    buffer and some other data (written in cache, but not yet in main
    memory), the other data can not hit memory due to invalidation. That
    happen on rtl8187 where struct rtl8187_priv fields are located just
    before and after small buffers that are passed to USB layer and DMA
    is performed on them.
    
    To fix the problem we align buffers and reserve space after them to make
    them match cache line.
    
    This patch does not resolve all possible MIPS problems entirely, for
    that we have to assure that we always map cache aligned buffers for DMA,
    what can be complex or even not possible. But patch fixes visible and
    reproducible regression and seems other possible corruptions do not
    happen in practice, since Yeeloong laptop works stable without rtl8187
    driver.
    
    Bug report:
    https://bugzilla.kernel.org/show_bug.cgi?id=54391
    
    Reported-by: Petr Pisar <petr.pisar@atlas.cz>
    Bisected-by: Tom Li <biergaizi2009@gmail.com>
    Reported-and-tested-by: Tom Li <biergaizi2009@gmail.com>
    Cc: stable@vger.kernel.org
    Signed-off-by: Stanislaw Gruszka <stf_xl@wp.pl>

commit e2f141d67ad1e7fe10aaab61811e8a409dfb2442
Author: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Date:   Fri Feb 7 10:29:55 2014 +0530

    ath9k: Calculate IQ-CAL median
    
    This patch adds a routine to calculate the median IQ correction
    values for AR955x, which is used for outlier detection.
    The normal method which is used for all other chips is
    bypassed for AR955x.
    
    Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>

commit c52a6fce0820c8d0687443ab86058ae03b478c8f
Author: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Date:   Fri Feb 7 10:29:54 2014 +0530

    ath9k: Expand the IQ coefficient array
    
    This will be used for storing data for mutiple
    IQ calibration runs, for AR955x.
    
    Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>

commit 034969ff5c2b6431d10e07c1938f0b916da85cc3
Author: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Date:   Fri Feb 7 10:29:53 2014 +0530

    ath9k: Modify IQ calibration for AR955x
    
    IQ calibration post-processing for AR955x is different
    from other chips - instead of just doing it as part
    of AGC calibration once, it is triggered 3 times and
    a median is determined. This patch adds initial support
    for changing the calibration behavior for AR955x.
    
    Also, to simplify things, a helper routine to issue/poll
    AGC calibration is used.
    
    For non-AR955x chips, the iqcal_idx (which will be used
    in subsequent patches) is set to zero.
    
    Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>

commit 9b1ed6454e6f3511f24266be99b4e403f243f6a8
Author: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Date:   Fri Feb 7 10:29:52 2014 +0530

    ath9k: Fix magnitude/phase calculation
    
    Incorrect values are programmed in the registers
    containing the IQ correction coefficients by the IQ-CAL
    post-processing code. Fix this.
    
    Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>

commit 36f93484f96f79171dcecb67c5ef0c3de22531a6
Author: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Date:   Fri Feb 7 10:29:51 2014 +0530

    ath9k: Rename ar9003_hw_tx_iqcal_load_avg_2_passes
    
    Use ar9003_hw_tx_iq_cal_outlier_detection instead.
    
    Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>

commit 3af09a7f5d21dd5fd15b973ce6a91a575da30417
Author: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Date:   Fri Feb 7 10:29:50 2014 +0530

    ath9k: Check explicitly for IQ calibration
    
    In chips like AR955x, the initvals contain the information
    whether IQ calibration is to be done in the HW when an
    AGC calibration is triggered. Check if IQ-CAL is enabled
    in the initvals before flagging 'txiqcal_done' as true.
    
    Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>

commit cb4969634b93c4643a32cc3fbd27d2b288b25771
Author: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Date:   Fri Feb 7 10:29:49 2014 +0530

    ath9k: Fix IQ cal post processing for SoC
    
    Calibration data is not reused for SoC chips, so
    call ar9003_hw_tx_iq_cal_post_proc() with the correct
    argument. The 'is_reusable' flag is currently used
    only for PC-OEM chips, but it makes things clearer to
    specify it explicity.
    
    Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>

commit e138e0ef9560c46ce93dbb22a728a57888e94d1c
Author: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Date:   Mon Feb 3 13:31:37 2014 +0530

    ath9k: Fix TX power calculation
    
    The commit, "ath9k_hw: Fix incorrect Tx control power in AR9003 template"
    fixed the incorrect values in the eeprom templates, but if
    boards have already been calibrated with incorrect values,
    they would still be using the wrong TX power. Fix this by assigning
    a default value in such cases.
    
    Cc: Rajkumar Manoharan <rmanohar@qti.qualcomm.com>
    Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>

commit b9f268b5b01331c3c82179abca551429450e9417
Author: Michal Kazior <michal.kazior@tieto.com>
Date:   Wed Jan 29 14:22:27 2014 +0100

    cfg80211: consider existing DFS interfaces
    
    It was possible to break interface combinations in
    the following way:
    
     combo 1: iftype = AP, num_ifaces = 2, num_chans = 2,
     combo 2: iftype = AP, num_ifaces = 1, num_chans = 1, radar = HT20
    
    With the above interface combinations it was
    possible to:
    
     step 1. start AP on DFS channel by matching combo 2
     step 2. start AP on non-DFS channel by matching combo 1
    
    This was possible beacuse (step 2) did not consider
    if other interfaces require radar detection.
    
    The patch changes how cfg80211 tracks channels -
    instead of channel itself now a complete chandef
    is stored.
    
    Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
    Signed-off-by: Johannes Berg <johannes.berg@intel.com>

commit bc9c62f5f511cc395c62dbf4cdd437f23db53b28
Author: Antonio Quartulli <antonio@open-mesh.com>
Date:   Wed Jan 29 17:53:43 2014 +0100

    cfg80211: fix channel configuration in IBSS join
    
    When receiving an IBSS_JOINED event select the BSS object
    based on the {bssid, channel} couple rather than the bssid
    only.
    With the current approach if another cell having the same
    BSSID (but using a different channel) exists then cfg80211
    picks up the wrong BSS object.
    The result is a mismatching channel configuration between
    cfg80211 and the driver, that can lead to any sort of
    problem.
    
    The issue can be triggered by having an IBSS sitting on
    given channel and then asking the driver to create a new
    cell using the same BSSID but with a different frequency.
    By passing the channel to cfg80211_get_bss() we can solve
    this ambiguity and retrieve/create the correct BSS object.
    All the users of cfg80211_ibss_joined() have been changed
    accordingly.
    
    Moreover WARN when cfg80211_ibss_joined() gets a NULL
    channel as argument and remove a bogus call of the same
    function in ath6kl (it does not make sense to call
    cfg80211_ibss_joined() with a zero BSSID on ibss-leave).
    
    Cc: Kalle Valo <kvalo@qca.qualcomm.com>
    Cc: Arend van Spriel <arend@broadcom.com>
    Cc: Bing Zhao <bzhao@marvell.com>
    Cc: Jussi Kivilinna <jussi.kivilinna@iki.fi>
    Cc: libertas-dev@lists.infradead.org
    Acked-by: Kalle Valo <kvalo@qca.qualcomm.com>
    Signed-off-by: Antonio Quartulli <antonio@open-mesh.com>
    [minor code cleanup in ath6kl]
    Signed-off-by: Johannes Berg <johannes.berg@intel.com>

commit 7e0c41cb41f215aba2c39b1c237bb4d42ec49a85
Author: Johannes Berg <johannes.berg@intel.com>
Date:   Fri Jan 24 14:41:44 2014 +0100

    mac80211: fix bufferable MMPDU RX handling
    
    Action, disassoc and deauth frames are bufferable, and as such don't
    have the PM bit in the frame control field reserved which means we
    need to react to the bit when receiving in such a frame.
    
    Fix this by introducing a new helper ieee80211_is_bufferable_mmpdu()
    and using it for the RX path that currently ignores the PM bit in
    any non-data frames for doze->wake transitions, but listens to it in
    all frames for wake->doze transitions, both of which are wrong.
    
    Also use the new helper in the TX path to clean up the code.
    
    Signed-off-by: Johannes Berg <johannes.berg@intel.com>

commit fc0df6d2343636e3f48a069330d5b972e3d8659d
Author: Janusz Dziedzic <janusz.dziedzic@tieto.com>
Date:   Fri Jan 24 14:29:21 2014 +0100

    cfg80211: set preset_chandef after channel switch
    
    Set preset_chandef in channel switch notification.
    In other case we will have old preset_chandef.
    
    Signed-off-by: Janusz Dziedzic <janusz.dziedzic@tieto.com>
    Signed-off-by: Johannes Berg <johannes.berg@intel.com>

commit cdec895e2344987ff171cece96e25d7407a3ebf6
Author: Simon Wunderlich <simon@open-mesh.com>
Date:   Fri Jan 24 23:48:29 2014 +0100

    mac80211: send ibss probe responses with noack flag
    
    Responding to probe requests for scanning clients will often create
    excessive retries, as it happens quite often that the scanning client
    already left the channel. Therefore do it like hostapd and send probe
    responses for wildcard SSID only once by using the noack flag.
    
    Signed-off-by: Simon Wunderlich <simon@open-mesh.com>
    [fix typo & 'wildcard SSID' in commit log]
    Signed-off-by: Johannes Berg <johannes.berg@intel.com>

commit 0b865d1e6b9c05052adae9315df7cb195dc60c3b
Author: Luciano Coelho <luciano.coelho@intel.com>
Date:   Tue Jan 28 17:09:08 2014 +0200

    mac80211: ibss: remove unnecessary call to release channel
    
    The ieee80211_vif_use_channel() function calls
    ieee80211_vif_release_channel(), so there's no need to call it
    explicitly in __ieee80211_sta_join_ibss().
    
    Signed-off-by: Luciano Coelho <luciano.coelho@intel.com>
    Signed-off-by: Johannes Berg <johannes.berg@intel.com>

commit e1b6c17e971f0a51ff86c2dac2584c63cd999cd7
Author: Michal Kazior <michal.kazior@tieto.com>
Date:   Wed Jan 29 07:56:21 2014 +0100

    mac80211: add missing CSA locking
    
    The patch adds a missing sdata lock and adds a few
    lockdeps for easier maintenance.
    
    Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
    Signed-off-by: Johannes Berg <johannes.berg@intel.com>

commit ad17ba7d14d225b109b73c177cd446afb8050598
Author: Michal Kazior <michal.kazior@tieto.com>
Date:   Wed Jan 29 07:56:20 2014 +0100

    mac80211: fix sdata->radar_required locking
    
    radar_required setting wasn't protected by
    local->mtx in some places. This should prevent
    from scanning/radar detection/roc colliding.
    
    Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
    Signed-off-by: Johannes Berg <johannes.berg@intel.com>

commit 5fcd5f1808813a3d9e502fd756e01bee8a79c85d
Author: Michal Kazior <michal.kazior@tieto.com>
Date:   Wed Jan 29 07:56:19 2014 +0100

    mac80211: move csa_active setting in STA CSA
    
    The sdata->vif.csa_active could be left set after,
    e.g. channel context constraints check fail in STA
    mode leaving the interface in a strange state for
    a brief period of time until it is disconnected.
    This was harmless but ugly.
    
    Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
    Reviewed-by: Luciano Coelho <luciano.coelho@intel.com>
    Signed-off-by: Johannes Berg <johannes.berg@intel.com>

commit e486da4b7eed71821c6b4c1bb9ac62ffd3ab13e9
Author: Michal Kazior <michal.kazior@tieto.com>
Date:   Wed Jan 29 07:56:18 2014 +0100

    mac80211: fix possible memory leak on AP CSA failure
    
    If CSA for AP interface failed and the interface
    was not stopped afterwards another CSA request
    would leak sdata->u.ap.next_beacon.
    
    Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
    Reviewed-by: Luciano Coelho <luciano.coelho@intel.com>
    Signed-off-by: Johannes Berg <johannes.berg@intel.com>

commit 3a77ba08940682bf3d52cf14f980337324af9d4a
Author: Johannes Berg <johannes.berg@intel.com>
Date:   Sat Feb 1 00:33:29 2014 +0100

    mac80211: fix fragmentation code, particularly for encryption
    
    The "new" fragmentation code (since my rewrite almost 5 years ago)
    erroneously sets skb->len rather than using skb_trim() to adjust
    the length of the first fragment after copying out all the others.
    This leaves the skb tail pointer pointing to after where the data
    originally ended, and thus causes the encryption MIC to be written
    at that point, rather than where it belongs: immediately after the
    data.
    
    The impact of this is that if software encryption is done, then
     a) encryption doesn't work for the first fragment, the connection
        becomes unusable as the first fragment will never be properly
        verified at the receiver, the MIC is practically guaranteed to
        be wrong
     b) we leak up to 8 bytes of plaintext (!) of the packet out into
        the air
    
    This is only mitigated by the fact that many devices are capable
    of doing encryption in hardware, in which case this can't happen
    as the tail pointer is irrelevant in that case. Additionally,
    fragmentation is not used very frequently and would normally have
    to be configured manually.
    
    Fix this by using skb_trim() properly.
    
    Cc: stable@vger.kernel.org
    Fixes: 2de8e0d999b8 ("mac80211: rewrite fragmentation")
    Reported-by: Jouni Malinen <j@w1.fi>
    Signed-off-by: Johannes Berg <johannes.berg@intel.com>

commit de5f242e0c10e841017e37eb8c38974a642dbca8
Author: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Date:   Tue Jan 28 06:21:59 2014 +0530

    ath9k: Fix build error on ARM
    
    Use mdelay instead of udelay to fix this error:
    
    ERROR: "__bad_udelay" [drivers/net/wireless/ath/ath9k/ath9k_hw.ko] undefined!
    make[1]: *** [__modpost] Error 1
    make: *** [modules] Error 2
    
    Reported-by: Josh Boyer <jwboyer@fedoraproject.org>
    Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>

commit 8e3ea7a51dfc61810fcefd947f6edcf61125252a
Author: Geert Uytterhoeven <geert@linux-m68k.org>
Date:   Sun Jan 26 11:53:21 2014 +0100

    ath9k: Fix uninitialized variable in ath9k_has_tx_pending()
    
    drivers/net/wireless/ath/ath9k/main.c: In function ‘ath9k_has_tx_pending’:
    drivers/net/wireless/ath/ath9k/main.c:1869: warning: ‘npend’ may be used uninitialized in this function
    
    Introduced by commit 10e2318103f5941aa70c318afe34bc41f1b98529 ("ath9k:
    optimize ath9k_flush").
    
    Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>

commit a4a634a6937ebdd827fa58e8fcdb8ca49a3769f6
Author: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Date:   Mon Jan 27 11:07:42 2014 +0200

    mac80211: release the channel in error path in start_ap
    
    When the driver cannot start the AP or when the assignement
    of the beacon goes wrong, we need to unassign the vif.
    
    Cc: stable@vger.kernel.org
    Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
    Signed-off-by: Johannes Berg <johannes.berg@intel.com>

commit dfb6889a75c601aedb7450b7e606668e77da6679
Author: Johannes Berg <johannes.berg@intel.com>
Date:   Wed Jan 22 11:14:19 2014 +0200

    cfg80211: send scan results from work queue
    
    Due to the previous commit, when a scan finishes, it is in theory
    possible to hit the following sequence:
     1. interface starts being removed
     2. scan is cancelled by driver and cfg80211 is notified
     3. scan done work is scheduled
     4. interface is removed completely, rdev->scan_req is freed,
        event sent to userspace but scan done work remains pending
     5. new scan is requested on another virtual interface
     6. scan done work runs, freeing the still-running scan
    
    To fix this situation, hang on to the scan done message and block
    new scans while that is the case, and only send the message from
    the work function, regardless of whether the scan_req is already
    freed from interface removal. This makes step 5 above impossible
    and changes step 6 to be
     5. scan done work runs, sending the scan done message
    
    As this can't work for wext, so we send the message immediately,
    but this shouldn't be an issue since we still return -EBUSY.
    
    Signed-off-by: Johannes Berg <johannes.berg@intel.com>

commit 45b7ab41fc08627d9a8428cb413d5d84662a9707
Author: Johannes Berg <johannes.berg@intel.com>
Date:   Wed Jan 22 11:14:18 2014 +0200

    cfg80211: fix scan done race
    
    When an interface/wdev is removed, any ongoing scan should be
    cancelled by the driver. This will make it call cfg80211, which
    only queues a work struct. If interface/wdev removal is quick
    enough, this can leave the scan request pending and processed
    only after the interface is gone, causing a use-after-free.
    
    Fix this by making sure the scan request is not pending after
    the interface is destroyed. We can't flush or cancel the work
    item due to locking concerns, but when it'll run it shouldn't
    find anything to do. This leaves a potential issue, if a new
    scan gets requested before the work runs, it prematurely stops
    the running scan, potentially causing another crash. I'll fix
    that in the next patch.
    
    This was particularly observed with P2P_DEVICE wdevs, likely
    because freeing them is quicker than freeing netdevs.
    
    Reported-by: Andrei Otcheretianski <andrei.otcheretianski@intel.com>
    Fixes: 4a58e7c38443 ("cfg80211: don't "leak" uncompleted scans")
    Signed-off-by: Johannes Berg <johannes.berg@intel.com>

commit ae04fa489ab31b5a10d3cc8399f52761175d4321
Author: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Date:   Thu Jan 23 14:28:16 2014 +0200

    mac80211: avoid deadlock revealed by lockdep
    
    sdata->u.ap.request_smps_work can’t be flushed synchronously
    under wdev_lock(wdev) since ieee80211_request_smps_ap_work
    itself locks the same lock.
    While at it, reset the driver_smps_mode when the ap is
    stopped to its default: OFF.
    
    This solves:
    
    ======================================================
    [ INFO: possible circular locking dependency detected ]
    3.12.0-ipeer+ #2 Tainted: G           O
    -------------------------------------------------------
    rmmod/2867 is trying to acquire lock:
      ((&sdata->u.ap.request_smps_work)){+.+...}, at: [<c105b8d0>] flush_work+0x0/0x90
    
    but task is already holding lock:
      (&wdev->mtx){+.+.+.}, at: [<f9b32626>] cfg80211_stop_ap+0x26/0x230 [cfg80211]
    
    which lock already depends on the new lock.
    
    the existing dependency chain (in reverse order) is:
    
    -> #1 (&wdev->mtx){+.+.+.}:
            [<c10aefa9>] lock_acquire+0x79/0xe0
            [<c1607a1a>] mutex_lock_nested+0x4a/0x360
            [<fb06288b>] ieee80211_request_smps_ap_work+0x2b/0x50 [mac80211]
            [<c105cdd8>] process_one_work+0x198/0x450
            [<c105d469>] worker_thread+0xf9/0x320
            [<c10669ff>] kthread+0x9f/0xb0
            [<c1613397>] ret_from_kernel_thread+0x1b/0x28
    
    -> #0 ((&sdata->u.ap.request_smps_work)){+.+...}:
            [<c10ae9df>] __lock_acquire+0x183f/0x1910
            [<c10aefa9>] lock_acquire+0x79/0xe0
            [<c105b917>] flush_work+0x47/0x90
            [<c105d867>] __cancel_work_timer+0x67/0xe0
            [<c105d90f>] cancel_work_sync+0xf/0x20
            [<fb0765cc>] ieee80211_stop_ap+0x8c/0x340 [mac80211]
            [<f9b3268c>] cfg80211_stop_ap+0x8c/0x230 [cfg80211]
            [<f9b0d8f9>] cfg80211_leave+0x79/0x100 [cfg80211]
            [<f9b0da72>] cfg80211_netdev_notifier_call+0xf2/0x4f0 [cfg80211]
            [<c160f2c9>] notifier_call_chain+0x59/0x130
            [<c106c6de>] __raw_notifier_call_chain+0x1e/0x30
            [<c106c70f>] raw_notifier_call_chain+0x1f/0x30
            [<c14f8213>] call_netdevice_notifiers_info+0x33/0x70
            [<c14f8263>] call_netdevice_notifiers+0x13/0x20
            [<c14f82a4>] __dev_close_many+0x34/0xb0
            [<c14f83fe>] dev_close_many+0x6e/0xc0
            [<c14f9c77>] rollback_registered_many+0xa7/0x1f0
            [<c14f9dd4>] unregister_netdevice_many+0x14/0x60
            [<fb06f4d9>] ieee80211_remove_interfaces+0xe9/0x170 [mac80211]
            [<fb055116>] ieee80211_unregister_hw+0x56/0x110 [mac80211]
            [<fa3e9396>] iwl_op_mode_mvm_stop+0x26/0xe0 [iwlmvm]
            [<f9b9d8ca>] _iwl_op_mode_stop+0x3a/0x70 [iwlwifi]
            [<f9b9d96f>] iwl_opmode_deregister+0x6f/0x90 [iwlwifi]
            [<fa405179>] __exit_compat+0xd/0x19 [iwlmvm]
            [<c10b8bf9>] SyS_delete_module+0x179/0x2b0
            [<c1613421>] sysenter_do_call+0x12/0x32
    
    Fixes: 687da132234f ("mac80211: implement SMPS for AP")
    Cc: <stable@vger.kernel.org> [3.13]
    Reported-by: Ilan Peer <ilan.peer@intel.com>
    Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
    Signed-off-by: Johannes Berg <johannes.berg@intel.com>

commit 178b205e96217164fd7c30113464250d0b6f5eca
Author: Johannes Berg <johannes.berg@intel.com>
Date:   Thu Jan 23 16:32:29 2014 +0100

    cfg80211: re-enable 5/10 MHz support
    
    Unfortunately I forgot this during the merge window, but the
    patch seems small enough to go in as a fix. The userspace API
    bug that was the reason for disabling it has long been fixed.
    
    Signed-off-by: Johannes Berg <johannes.berg@intel.com>

commit 110a1c79acda14edc83b7c8dc5af9c7ddd23eb61
Author: Pontus Fuchs <pontus.fuchs@gmail.com>
Date:   Thu Jan 16 15:00:40 2014 +0100

    nl80211: Reset split_start when netlink skb is exhausted
    
    When the netlink skb is exhausted split_start is left set. In the
    subsequent retry, with a larger buffer, the dump is continued from the
    failing point instead of from the beginning.
    
    This was causing my rt28xx based USB dongle to now show up when
    running "iw list" with an old iw version without split dump support.
    
    Cc: stable@vger.kernel.org
    Fixes: 3713b4e364ef ("nl80211: allow splitting wiphy information in dumps")
    Signed-off-by: Pontus Fuchs <pontus.fuchs@gmail.com>
    [avoid the entire workaround when state->split is set]
    Signed-off-by: Johannes Berg <johannes.berg@intel.com>

commit b4c31b45ffc7ef110fa9ecc34d7878fe7c5b9da4
Author: Eliad Peller <eliad@wizery.com>
Date:   Sun Jan 12 11:06:37 2014 +0200

    mac80211: move roc cookie assignment earlier
    
    ieee80211_start_roc_work() might add a new roc
    to existing roc, and tell cfg80211 it has already
    started.
    
    However, this might happen before the roc cookie
    was set, resulting in REMAIN_ON_CHANNEL (started)
    event with null cookie. Consequently, it can make
    wpa_supplicant go out of sync.
    
    Fix it by setting the roc cookie earlier.
    
    Cc: stable@vger.kernel.org
    Signed-off-by: Eliad Peller <eliad@wizery.com>
    Signed-off-by: Johannes Berg <johannes.berg@intel.com>

commit cfdc9157bfd7bcf88ab4dae08873a9907eba984c
Author: Johannes Berg <johannes.berg@intel.com>
Date:   Fri Jan 24 14:06:29 2014 +0100

    nl80211: send event when AP operation is stopped
    
    There are a few cases, e.g. suspend, where an AP interface is
    stopped by the kernel rather than by userspace request, most
    commonly when suspending. To let userspace know about this,
    send the NL80211_CMD_STOP_AP command as an event every time
    an AP interface is stopped. This also happens when userspace
    did in fact request the AP stop, but that's not a problem.
    
    For full-MAC drivers this may need to be extended to also
    cover cases where the device stopped the AP operation for
    some reason, this a bit more complicated because then all
    cfg80211 state also needs to be reset; such API is not part
    of this patch.
    
    Signed-off-by: Johannes Berg <johannes.berg@intel.com>

commit d5d567eda7704f190379ca852a8f9a4112e3eee3
Author: Johannes Berg <johannes.berg@intel.com>
Date:   Thu Jan 23 16:20:29 2014 +0100

    mac80211: add length check in ieee80211_is_robust_mgmt_frame()
    
    A few places weren't checking that the frame passed to the
    function actually has enough data even though the function
    clearly documents it must have a payload byte. Make this
    safer by changing the function to take an skb and checking
    the length inside. The old version is preserved for now as
    the rtl* drivers use it and don't have a correct skb.
    
    Signed-off-by: Johannes Berg <johannes.berg@intel.com>

commit f8f6d212a047fc65c7d3442dfc038f65517236fc
Author: Johannes Berg <johannes.berg@intel.com>
Date:   Fri Jan 24 10:53:53 2014 +0100

    nl80211: fix scheduled scan RSSI matchset attribute confusion
    
    The scheduled scan matchsets were intended to be a list of filters,
    with the found BSS having to pass at least one of them to be passed
    to the host. When the RSSI attribute was added, however, this was
    broken and currently wpa_supplicant adds that attribute in its own
    matchset; however, it doesn't intend that to mean that anything
    that passes the RSSI filter should be passed to the host, instead
    it wants it to mean that everything needs to also have higher RSSI.
    
    This is semantically problematic because we have a list of filters
    like [ SSID1, SSID2, SSID3, RSSI ] with no real indication which
    one should be OR'ed and which one AND'ed.
    
    To fix this, move the RSSI filter attribute into each matchset. As
    we need to stay backward compatible, treat a matchset with only the
    RSSI attribute as a "default RSSI filter" for all other matchsets,
    but only if there are other matchsets (an RSSI-only matchset by
    itself is still desirable.)
    
    To make driver implementation easier, keep a global min_rssi_thold
    for the entire request as well. The only affected driver is ath6kl.
    
    I found this when I looked into the code after Raja Mani submitted
    a patch fixing the n_match_sets calculation to disregard the RSSI,
    but that patch didn't address the semantic issue.
    
    Reported-by: Raja Mani <rmani@qti.qualcomm.com>
    Acked-by: Luciano Coelho <luciano.coelho@intel.com>
    Signed-off-by: Johannes Berg <johannes.berg@intel.com>

commit de553e8545e65a6dc4e45f43df7e1443d4291922
Author: Johannes Berg <johannes.berg@intel.com>
Date:   Fri Jan 24 10:17:47 2014 +0100

    nl80211: check nla_parse() return values
    
    If there's a policy, then nla_parse() return values must be
    checked, otherwise the policy is useless and there's nothing
    that ensures the attributes are actually what we expect them
    to be.
    
    Signed-off-by: Johannes Berg <johannes.berg@intel.com>

commit 652204a0733e9e1c54661d6f9d36e2e1e3b22bb1
Author: Karl Beldan <karl.beldan@rivierawaves.com>
Date:   Thu Jan 23 20:06:34 2014 +0100

    mac80211: send {ADD,DEL}BA on AC_VO like other mgmt frames, as per spec
    
    ATM, {ADD,DEL}BA and BAR frames are sent on the AC matching the TID of
    the BA parameters. In the discussion [1] about this patch, Johannes
    recalled that it fixed some races with the DELBA and indeed this
    behavior was introduced in [2].
    While [2] is right for the BARs, the part queueing the {ADD,DEL}BAs on
    their BA params TID AC violates the spec and is more a workaround for
    some drivers. Helmut expressed some concerns wrt such drivers, in
    particular DELBAs in rt2x00.
    
    ATM, DELBAs are sent after a driver has called (hence "purposely")
    ieee80211_start_tx_ba_cb_irqsafe and Johannes and Emmanuel gave some
    details wrt intentions behind the split of the IEEE80211_AMPDU_TX_STOP_*
    given to the driver ampdu_action supposed to call this function, which
    could prove handy to people trying to do the right thing in faulty
    drivers (if their fw/hw don't get in their way).
    
    [1] http://mid.gmane.org/1390391564-18481-1-git-send-email-karl.beldan@gmail.com
    [2] Commit: cf6bb79ad828 ("mac80211: Use appropriate TID for sending BAR, ADDBA and DELBA frames")
    
    Signed-off-by: Karl Beldan <karl.beldan@rivierawaves.com>
    Cc: Helmut Schaa <helmut.schaa@googlemail.com>
    Cc: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
    Signed-off-by: Johannes Berg <johannes.berg@intel.com>
--- a/drivers/net/wireless/ath/ath6kl/cfg80211.c
+++ b/drivers/net/wireless/ath/ath6kl/cfg80211.c
@@ -790,7 +790,7 @@ void ath6kl_cfg80211_connect_event(struc
        if (nw_type & ADHOC_NETWORK) {
                ath6kl_dbg(ATH6KL_DBG_WLAN_CFG, "ad-hoc %s selected\n",
                           nw_type & ADHOC_CREATOR ? "creator" : "joiner");
-               cfg80211_ibss_joined(vif->ndev, bssid, GFP_KERNEL);
+               cfg80211_ibss_joined(vif->ndev, bssid, chan, GFP_KERNEL);
                cfg80211_put_bss(ar->wiphy, bss);
                return;
        }
@@ -861,13 +861,9 @@ void ath6kl_cfg80211_disconnect_event(st
        }
 
        if (vif->nw_type & ADHOC_NETWORK) {
-               if (vif->wdev.iftype != NL80211_IFTYPE_ADHOC) {
+               if (vif->wdev.iftype != NL80211_IFTYPE_ADHOC)
                        ath6kl_dbg(ATH6KL_DBG_WLAN_CFG,
                                   "%s: ath6k not in ibss mode\n", __func__);
-                       return;
-               }
-               memset(bssid, 0, ETH_ALEN);
-               cfg80211_ibss_joined(vif->ndev, bssid, GFP_KERNEL);
                return;
        }
 
@@ -3256,6 +3252,15 @@ static int ath6kl_cfg80211_sscan_start(s
        struct ath6kl_vif *vif = netdev_priv(dev);
        u16 interval;
        int ret, rssi_thold;
+       int n_match_sets = request->n_match_sets;
+
+       /*
+        * If there's a matchset w/o an SSID, then assume it's just for
+        * the RSSI (nothing else is currently supported) and ignore it.
+        * The device only supports a global RSSI filter that we set below.
+        */
+       if (n_match_sets == 1 && !request->match_sets[0].ssid.ssid_len)
+               n_match_sets = 0;
 
        if (ar->state != ATH6KL_STATE_ON)
                return -EIO;
@@ -3268,11 +3273,11 @@ static int ath6kl_cfg80211_sscan_start(s
        ret = ath6kl_set_probed_ssids(ar, vif, request->ssids,
                                      request->n_ssids,
                                      request->match_sets,
-                                     request->n_match_sets);
+                                     n_match_sets);
        if (ret < 0)
                return ret;
 
-       if (!request->n_match_sets) {
+       if (!n_match_sets) {
                ret = ath6kl_wmi_bssfilter_cmd(ar->wmi, vif->fw_vif_idx,
                                               ALL_BSS_FILTER, 0);
                if (ret < 0)
@@ -3286,12 +3291,12 @@ static int ath6kl_cfg80211_sscan_start(s
 
        if (test_bit(ATH6KL_FW_CAPABILITY_RSSI_SCAN_THOLD,
                     ar->fw_capabilities)) {
-               if (request->rssi_thold <= NL80211_SCAN_RSSI_THOLD_OFF)
+               if (request->min_rssi_thold <= NL80211_SCAN_RSSI_THOLD_OFF)
                        rssi_thold = 0;
-               else if (request->rssi_thold < -127)
+               else if (request->min_rssi_thold < -127)
                        rssi_thold = -127;
                else
-                       rssi_thold = request->rssi_thold;
+                       rssi_thold = request->min_rssi_thold;
 
                ret = ath6kl_wmi_set_rssi_filter_cmd(ar->wmi, vif->fw_vif_idx,
                                                     rssi_thold);
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -1316,7 +1316,7 @@ static bool ath9k_hw_set_reset(struct at
        if (AR_SREV_9300_20_OR_LATER(ah))
                udelay(50);
        else if (AR_SREV_9100(ah))
-               udelay(10000);
+               mdelay(10);
        else
                udelay(100);
 
@@ -1534,7 +1534,7 @@ EXPORT_SYMBOL(ath9k_hw_check_nav);
 bool ath9k_hw_check_alive(struct ath_hw *ah)
 {
        int count = 50;
-       u32 reg;
+       u32 reg, last_val;
 
        if (AR_SREV_9300(ah))
                return !ath9k_hw_detect_mac_hang(ah);
@@ -1542,9 +1542,13 @@ bool ath9k_hw_check_alive(struct ath_hw 
        if (AR_SREV_9285_12_OR_LATER(ah))
                return true;
 
+       last_val = REG_READ(ah, AR_OBS_BUS_1);
        do {
                reg = REG_READ(ah, AR_OBS_BUS_1);
+               if (reg != last_val)
+                       return true;
 
+               last_val = reg;
                if ((reg & 0x7E7FFFEF) == 0x00702400)
                        continue;
 
@@ -1556,6 +1560,8 @@ bool ath9k_hw_check_alive(struct ath_hw 
                default:
                        return true;
                }
+
+               udelay(1);
        } while (count-- > 0);
 
        return false;
@@ -2051,9 +2057,8 @@ static bool ath9k_hw_set_power_awake(str
 
        REG_SET_BIT(ah, AR_RTC_FORCE_WAKE,
                    AR_RTC_FORCE_WAKE_EN);
-
        if (AR_SREV_9100(ah))
-               udelay(10000);
+               mdelay(10);
        else
                udelay(50);
 
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -451,7 +451,7 @@ void ath9k_tasklet(unsigned long data)
                 * interrupts are enabled in the reset routine.
                 */
                atomic_inc(&ah->intr_ref_cnt);
-               ath_dbg(common, ANY, "FATAL: Skipping interrupts\n");
+               ath_dbg(common, RESET, "FATAL: Skipping interrupts\n");
                goto out;
        }
 
@@ -471,7 +471,7 @@ void ath9k_tasklet(unsigned long data)
                         * interrupts are enabled in the reset routine.
                         */
                        atomic_inc(&ah->intr_ref_cnt);
-                       ath_dbg(common, ANY,
+                       ath_dbg(common, RESET,
                                "BB_WATCHDOG: Skipping interrupts\n");
                        goto out;
                }
@@ -484,7 +484,7 @@ void ath9k_tasklet(unsigned long data)
                        type = RESET_TYPE_TX_GTT;
                        ath9k_queue_reset(sc, type);
                        atomic_inc(&ah->intr_ref_cnt);
-                       ath_dbg(common, ANY,
+                       ath_dbg(common, RESET,
                                "GTT: Skipping interrupts\n");
                        goto out;
                }
@@ -1866,7 +1866,7 @@ static void ath9k_set_coverage_class(str
 
 static bool ath9k_has_tx_pending(struct ath_softc *sc)
 {
-       int i, npend;
+       int i, npend = 0;
 
        for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
                if (!ATH_TXQ_SETUP(sc, i))
--- a/drivers/net/wireless/iwlwifi/mvm/scan.c
+++ b/drivers/net/wireless/iwlwifi/mvm/scan.c
@@ -595,6 +595,9 @@ static void iwl_scan_offload_build_ssid(
         * config match list.
         */
        for (i = 0; i < req->n_match_sets && i < PROBE_OPTION_MAX; i++) {
+               /* skip empty SSID matchsets */
+               if (!req->match_sets[i].ssid.ssid_len)
+                       continue;
                scan->direct_scan[i].id = WLAN_EID_SSID;
                scan->direct_scan[i].len = req->match_sets[i].ssid.ssid_len;
                memcpy(scan->direct_scan[i].ssid, req->match_sets[i].ssid.ssid,
--- a/drivers/net/wireless/rtlwifi/rtl8188ee/trx.c
+++ b/drivers/net/wireless/rtlwifi/rtl8188ee/trx.c
@@ -452,7 +452,7 @@ bool rtl88ee_rx_query_desc(struct ieee80
                        /* During testing, hdr was NULL */
                        return false;
                }
-               if ((ieee80211_is_robust_mgmt_frame(hdr)) &&
+               if ((_ieee80211_is_robust_mgmt_frame(hdr)) &&
                    (ieee80211_has_protected(hdr->frame_control)))
                        rx_status->flag &= ~RX_FLAG_DECRYPTED;
                else
--- a/drivers/net/wireless/rtlwifi/rtl8192ce/trx.c
+++ b/drivers/net/wireless/rtlwifi/rtl8192ce/trx.c
@@ -393,7 +393,7 @@ bool rtl92ce_rx_query_desc(struct ieee80
                        /* In testing, hdr was NULL here */
                        return false;
                }
-               if ((ieee80211_is_robust_mgmt_frame(hdr)) &&
+               if ((_ieee80211_is_robust_mgmt_frame(hdr)) &&
                    (ieee80211_has_protected(hdr->frame_control)))
                        rx_status->flag &= ~RX_FLAG_DECRYPTED;
                else
--- a/drivers/net/wireless/rtlwifi/rtl8192se/trx.c
+++ b/drivers/net/wireless/rtlwifi/rtl8192se/trx.c
@@ -310,7 +310,7 @@ bool rtl92se_rx_query_desc(struct ieee80
                        /* during testing, hdr was NULL here */
                        return false;
                }
-               if ((ieee80211_is_robust_mgmt_frame(hdr)) &&
+               if ((_ieee80211_is_robust_mgmt_frame(hdr)) &&
                        (ieee80211_has_protected(hdr->frame_control)))
                        rx_status->flag &= ~RX_FLAG_DECRYPTED;
                else
--- a/drivers/net/wireless/rtlwifi/rtl8723ae/trx.c
+++ b/drivers/net/wireless/rtlwifi/rtl8723ae/trx.c
@@ -334,7 +334,7 @@ bool rtl8723ae_rx_query_desc(struct ieee
                        /* during testing, hdr could be NULL here */
                        return false;
                }
-               if ((ieee80211_is_robust_mgmt_frame(hdr)) &&
+               if ((_ieee80211_is_robust_mgmt_frame(hdr)) &&
                        (ieee80211_has_protected(hdr->frame_control)))
                        rx_status->flag &= ~RX_FLAG_DECRYPTED;
                else
--- a/include/linux/ieee80211.h
+++ b/include/linux/ieee80211.h
@@ -597,6 +597,20 @@ static inline int ieee80211_is_qos_nullf
 }
 
 /**
+ * ieee80211_is_bufferable_mmpdu - check if frame is bufferable MMPDU
+ * @fc: frame control field in little-endian byteorder
+ */
+static inline bool ieee80211_is_bufferable_mmpdu(__le16 fc)
+{
+       /* IEEE 802.11-2012, definition of "bufferable management frame";
+        * note that this ignores the IBSS special case. */
+       return ieee80211_is_mgmt(fc) &&
+              (ieee80211_is_action(fc) ||
+               ieee80211_is_disassoc(fc) ||
+               ieee80211_is_deauth(fc));
+}
+
+/**
  * ieee80211_is_first_frag - check if IEEE80211_SCTL_FRAG is not set
  * @seq_ctrl: frame sequence control bytes in little-endian byteorder
  */
@@ -2192,10 +2206,10 @@ static inline u8 *ieee80211_get_DA(struc
 }
 
 /**
- * ieee80211_is_robust_mgmt_frame - check if frame is a robust management frame
+ * _ieee80211_is_robust_mgmt_frame - check if frame is a robust management frame
  * @hdr: the frame (buffer must include at least the first octet of payload)
  */
-static inline bool ieee80211_is_robust_mgmt_frame(struct ieee80211_hdr *hdr)
+static inline bool _ieee80211_is_robust_mgmt_frame(struct ieee80211_hdr *hdr)
 {
        if (ieee80211_is_disassoc(hdr->frame_control) ||
            ieee80211_is_deauth(hdr->frame_control))
@@ -2224,6 +2238,17 @@ static inline bool ieee80211_is_robust_m
 }
 
 /**
+ * ieee80211_is_robust_mgmt_frame - check if skb contains a robust mgmt frame
+ * @skb: the skb containing the frame, length will be checked
+ */
+static inline bool ieee80211_is_robust_mgmt_frame(struct sk_buff *skb)
+{
+       if (skb->len < 25)
+               return false;
+       return _ieee80211_is_robust_mgmt_frame((void *)skb->data);
+}
+
+/**
  * ieee80211_is_public_action - check if frame is a public action frame
  * @hdr: the frame
  * @len: length of the frame
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -1395,9 +1395,11 @@ struct cfg80211_scan_request {
  * struct cfg80211_match_set - sets of attributes to match
  *
  * @ssid: SSID to be matched
+ * @rssi_thold: don't report scan results below this threshold (in s32 dBm)
  */
 struct cfg80211_match_set {
        struct cfg80211_ssid ssid;
+       s32 rssi_thold;
 };
 
 /**
@@ -1420,7 +1422,8 @@ struct cfg80211_match_set {
  * @dev: the interface
  * @scan_start: start time of the scheduled scan
  * @channels: channels to scan
- * @rssi_thold: don't report scan results below this threshold (in s32 dBm)
+ * @min_rssi_thold: for drivers only supporting a single threshold, this
+ *     contains the minimum over all matchsets
  */
 struct cfg80211_sched_scan_request {
        struct cfg80211_ssid *ssids;
@@ -1433,7 +1436,7 @@ struct cfg80211_sched_scan_request {
        u32 flags;
        struct cfg80211_match_set *match_sets;
        int n_match_sets;
-       s32 rssi_thold;
+       s32 min_rssi_thold;
 
        /* internal */
        struct wiphy *wiphy;
@@ -3130,8 +3133,8 @@ struct cfg80211_cached_keys;
  * @identifier: (private) Identifier used in nl80211 to identify this
  *     wireless device if it has no netdev
  * @current_bss: (private) Used by the internal configuration code
- * @channel: (private) Used by the internal configuration code to track
- *     the user-set AP, monitor and WDS channel
+ * @chandef: (private) Used by the internal configuration code to track
+ *     the user-set channel definition.
  * @preset_chandef: (private) Used by the internal configuration code to
  *     track the channel to be used for AP later
  * @bssid: (private) Used by the internal configuration code
@@ -3195,9 +3198,7 @@ struct wireless_dev {
 
        struct cfg80211_internal_bss *current_bss; /* associated / joined */
        struct cfg80211_chan_def preset_chandef;
-
-       /* for AP and mesh channel tracking */
-       struct ieee80211_channel *channel;
+       struct cfg80211_chan_def chandef;
 
        bool ibss_fixed;
        bool ibss_dfs_possible;
@@ -3879,6 +3880,7 @@ void cfg80211_michael_mic_failure(struct
  *
  * @dev: network device
  * @bssid: the BSSID of the IBSS joined
+ * @channel: the channel of the IBSS joined
  * @gfp: allocation flags
  *
  * This function notifies cfg80211 that the device joined an IBSS or
@@ -3888,7 +3890,8 @@ void cfg80211_michael_mic_failure(struct
  * with the locally generated beacon -- this guarantees that there is
  * always a scan result for this IBSS. cfg80211 will handle the rest.
  */
-void cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid, gfp_t gfp);
+void cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid,
+                         struct ieee80211_channel *channel, gfp_t gfp);
 
 /**
  * cfg80211_notify_new_candidate - notify cfg80211 of a new mesh peer candidate
--- a/include/uapi/linux/nl80211.h
+++ b/include/uapi/linux/nl80211.h
@@ -2442,9 +2442,15 @@ enum nl80211_reg_rule_attr {
  * enum nl80211_sched_scan_match_attr - scheduled scan match attributes
  * @__NL80211_SCHED_SCAN_MATCH_ATTR_INVALID: attribute number 0 is reserved
  * @NL80211_SCHED_SCAN_MATCH_ATTR_SSID: SSID to be used for matching,
- * only report BSS with matching SSID.
+ *     only report BSS with matching SSID.
  * @NL80211_SCHED_SCAN_MATCH_ATTR_RSSI: RSSI threshold (in dBm) for reporting a
- *     BSS in scan results. Filtering is turned off if not specified.
+ *     BSS in scan results. Filtering is turned off if not specified. Note that
+ *     if this attribute is in a match set of its own, then it is treated as
+ *     the default value for all matchsets with an SSID, rather than being a
+ *     matchset of its own without an RSSI filter. This is due to problems with
+ *     how this API was implemented in the past. Also, due to the same problem,
+ *     the only way to create a matchset with only an RSSI filter (with this
+ *     attribute) is if there's only a single matchset with the RSSI attribute.
  * @NL80211_SCHED_SCAN_MATCH_ATTR_MAX: highest scheduled scan filter
  *     attribute number currently defined
  * @__NL80211_SCHED_SCAN_MATCH_ATTR_AFTER_LAST: internal use
--- a/net/mac80211/agg-tx.c
+++ b/net/mac80211/agg-tx.c
@@ -107,7 +107,7 @@ static void ieee80211_send_addba_request
        mgmt->u.action.u.addba_req.start_seq_num =
                                        cpu_to_le16(start_seq_num << 4);
 
-       ieee80211_tx_skb_tid(sdata, skb, tid);
+       ieee80211_tx_skb(sdata, skb);
 }
 
 void ieee80211_send_bar(struct ieee80211_vif *vif, u8 *ra, u16 tid, u16 ssn)
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -970,9 +970,9 @@ static int ieee80211_start_ap(struct wip
        /* TODO: make hostapd tell us what it wants */
        sdata->smps_mode = IEEE80211_SMPS_OFF;
        sdata->needed_rx_chains = sdata->local->rx_chains;
-       sdata->radar_required = params->radar_required;
 
        mutex_lock(&local->mtx);
+       sdata->radar_required = params->radar_required;
        err = ieee80211_vif_use_channel(sdata, &params->chandef,
                                        IEEE80211_CHANCTX_SHARED);
        mutex_unlock(&local->mtx);
@@ -1021,8 +1021,10 @@ static int ieee80211_start_ap(struct wip
                                        IEEE80211_P2P_OPPPS_ENABLE_BIT;
 
        err = ieee80211_assign_beacon(sdata, &params->beacon);
-       if (err < 0)
+       if (err < 0) {
+               ieee80211_vif_release_channel(sdata);
                return err;
+       }
        changed |= err;
 
        err = drv_start_ap(sdata->local, sdata);
@@ -1032,6 +1034,7 @@ static int ieee80211_start_ap(struct wip
                if (old)
                        kfree_rcu(old, rcu_head);
                RCU_INIT_POINTER(sdata->u.ap.beacon, NULL);
+               ieee80211_vif_release_channel(sdata);
                return err;
        }
 
@@ -1053,6 +1056,7 @@ static int ieee80211_change_beacon(struc
        int err;
 
        sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+       sdata_assert_lock(sdata);
 
        /* don't allow changing the beacon while CSA is in place - offset
         * of channel switch counter may change
@@ -1080,6 +1084,8 @@ static int ieee80211_stop_ap(struct wiph
        struct probe_resp *old_probe_resp;
        struct cfg80211_chan_def chandef;
 
+       sdata_assert_lock(sdata);
+
        old_beacon = sdata_dereference(sdata->u.ap.beacon, sdata);
        if (!old_beacon)
                return -ENOENT;
@@ -1090,8 +1096,6 @@ static int ieee80211_stop_ap(struct wiph
        kfree(sdata->u.ap.next_beacon);
        sdata->u.ap.next_beacon = NULL;
 
-       cancel_work_sync(&sdata->u.ap.request_smps_work);
-
        /* turn off carrier for this interface and dependent VLANs */
        list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list)
                netif_carrier_off(vlan->dev);
@@ -1103,6 +1107,7 @@ static int ieee80211_stop_ap(struct wiph
        kfree_rcu(old_beacon, rcu_head);
        if (old_probe_resp)
                kfree_rcu(old_probe_resp, rcu_head);
+       sdata->u.ap.driver_smps_mode = IEEE80211_SMPS_OFF;
 
        __sta_info_flush(sdata, true);
        ieee80211_free_keys(sdata, true);
@@ -2638,6 +2643,24 @@ static int ieee80211_start_roc_work(stru
        INIT_DELAYED_WORK(&roc->work, ieee80211_sw_roc_work);
        INIT_LIST_HEAD(&roc->dependents);
 
+       /*
+        * cookie is either the roc cookie (for normal roc)
+        * or the SKB (for mgmt TX)
+        */
+       if (!txskb) {
+               /* local->mtx protects this */
+               local->roc_cookie_counter++;
+               roc->cookie = local->roc_cookie_counter;
+               /* wow, you wrapped 64 bits ... more likely a bug */
+               if (WARN_ON(roc->cookie == 0)) {
+                       roc->cookie = 1;
+                       local->roc_cookie_counter++;
+               }
+               *cookie = roc->cookie;
+       } else {
+               *cookie = (unsigned long)txskb;
+       }
+
        /* if there's one pending or we're scanning, queue this one */
        if (!list_empty(&local->roc_list) ||
            local->scanning || local->radar_detect_enabled)
@@ -2772,24 +2795,6 @@ static int ieee80211_start_roc_work(stru
        if (!queued)
                list_add_tail(&roc->list, &local->roc_list);
 
-       /*
-        * cookie is either the roc cookie (for normal roc)
-        * or the SKB (for mgmt TX)
-        */
-       if (!txskb) {
-               /* local->mtx protects this */
-               local->roc_cookie_counter++;
-               roc->cookie = local->roc_cookie_counter;
-               /* wow, you wrapped 64 bits ... more likely a bug */
-               if (WARN_ON(roc->cookie == 0)) {
-                       roc->cookie = 1;
-                       local->roc_cookie_counter++;
-               }
-               *cookie = roc->cookie;
-       } else {
-               *cookie = (unsigned long)txskb;
-       }
-
        return 0;
 }
 
@@ -3004,8 +3009,10 @@ void ieee80211_csa_finalize_work(struct 
        if (!ieee80211_sdata_running(sdata))
                goto unlock;
 
-       sdata->radar_required = sdata->csa_radar_required;
+       sdata_assert_lock(sdata);
+
        mutex_lock(&local->mtx);
+       sdata->radar_required = sdata->csa_radar_required;
        err = ieee80211_vif_change_channel(sdata, &changed);
        mutex_unlock(&local->mtx);
        if (WARN_ON(err < 0))
@@ -3022,13 +3029,13 @@ void ieee80211_csa_finalize_work(struct 
        switch (sdata->vif.type) {
        case NL80211_IFTYPE_AP:
                err = ieee80211_assign_beacon(sdata, sdata->u.ap.next_beacon);
+               kfree(sdata->u.ap.next_beacon);
+               sdata->u.ap.next_beacon = NULL;
+
                if (err < 0)
                        goto unlock;
 
                changed |= err;
-               kfree(sdata->u.ap.next_beacon);
-               sdata->u.ap.next_beacon = NULL;
-
                ieee80211_bss_info_change_notify(sdata, err);
                break;
        case NL80211_IFTYPE_ADHOC:
@@ -3066,7 +3073,7 @@ int ieee80211_channel_switch(struct wiph
        struct ieee80211_if_mesh __maybe_unused *ifmsh;
        int err, num_chanctx;
 
-       lockdep_assert_held(&sdata->wdev.mtx);
+       sdata_assert_lock(sdata);
 
        if (!list_empty(&local->roc_list) || local->scanning)
                return -EBUSY;
--- a/net/mac80211/ht.c
+++ b/net/mac80211/ht.c
@@ -375,7 +375,7 @@ void ieee80211_send_delba(struct ieee802
        mgmt->u.action.u.delba.params = cpu_to_le16(params);
        mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
 
-       ieee80211_tx_skb_tid(sdata, skb, tid);
+       ieee80211_tx_skb(sdata, skb);
 }
 
 void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
@@ -466,7 +466,9 @@ void ieee80211_request_smps_ap_work(stru
                             u.ap.request_smps_work);
 
        sdata_lock(sdata);
-       __ieee80211_request_smps_ap(sdata, sdata->u.ap.driver_smps_mode);
+       if (sdata_dereference(sdata->u.ap.beacon, sdata))
+               __ieee80211_request_smps_ap(sdata,
+                                           sdata->u.ap.driver_smps_mode);
        sdata_unlock(sdata);
 }
 
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -770,12 +770,19 @@ static void ieee80211_do_stop(struct iee
 
        ieee80211_roc_purge(local, sdata);
 
-       if (sdata->vif.type == NL80211_IFTYPE_STATION)
+       switch (sdata->vif.type) {
+       case NL80211_IFTYPE_STATION:
                ieee80211_mgd_stop(sdata);
-
-       if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
+               break;
+       case NL80211_IFTYPE_ADHOC:
                ieee80211_ibss_stop(sdata);
-
+               break;
+       case NL80211_IFTYPE_AP:
+               cancel_work_sync(&sdata->u.ap.request_smps_work);
+               break;
+       default:
+               break;
+       }
 
        /*
         * Remove all stations associated with this interface.
@@ -827,7 +834,9 @@ static void ieee80211_do_stop(struct iee
        cancel_work_sync(&local->dynamic_ps_enable_work);
 
        cancel_work_sync(&sdata->recalc_smps);
+       sdata_lock(sdata);
        sdata->vif.csa_active = false;
+       sdata_unlock(sdata);
        cancel_work_sync(&sdata->csa_finalize_work);
 
        cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -599,10 +599,10 @@ static int ieee80211_is_unicast_robust_m
 {
        struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 
-       if (skb->len < 24 || is_multicast_ether_addr(hdr->addr1))
+       if (is_multicast_ether_addr(hdr->addr1))
                return 0;
 
-       return ieee80211_is_robust_mgmt_frame(hdr);
+       return ieee80211_is_robust_mgmt_frame(skb);
 }
 
 
@@ -610,10 +610,10 @@ static int ieee80211_is_multicast_robust
 {
        struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 
-       if (skb->len < 24 || !is_multicast_ether_addr(hdr->addr1))
+       if (!is_multicast_ether_addr(hdr->addr1))
                return 0;
 
-       return ieee80211_is_robust_mgmt_frame(hdr);
+       return ieee80211_is_robust_mgmt_frame(skb);
 }
 
 
@@ -626,7 +626,7 @@ static int ieee80211_get_mmie_keyidx(str
        if (skb->len < 24 + sizeof(*mmie) || !is_multicast_ether_addr(hdr->da))
                return -1;
 
-       if (!ieee80211_is_robust_mgmt_frame((struct ieee80211_hdr *) hdr))
+       if (!ieee80211_is_robust_mgmt_frame(skb))
                return -1; /* not a robust management frame */
 
        mmie = (struct ieee80211_mmie *)
@@ -1128,6 +1128,13 @@ static void sta_ps_end(struct sta_info *
               sta->sta.addr, sta->sta.aid);
 
        if (test_sta_flag(sta, WLAN_STA_PS_DRIVER)) {
+               /*
+                * Clear the flag only if the other one is still set
+                * so that the TX path won't start TX'ing new frames
+                * directly ... In the case that the driver flag isn't
+                * set ieee80211_sta_ps_deliver_wakeup() will clear it.
+                */
+               clear_sta_flag(sta, WLAN_STA_PS_STA);
                ps_dbg(sta->sdata, "STA %pM aid %d driver-ps-blocked\n",
                       sta->sta.addr, sta->sta.aid);
                return;
@@ -1311,18 +1318,15 @@ ieee80211_rx_h_sta_process(struct ieee80
            !ieee80211_has_morefrags(hdr->frame_control) &&
            !(status->rx_flags & IEEE80211_RX_DEFERRED_RELEASE) &&
            (rx->sdata->vif.type == NL80211_IFTYPE_AP ||
-            rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN)) {
+            rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) &&
+           /* PM bit is only checked in frames where it isn't reserved,
+            * in AP mode it's reserved in non-bufferable management frames
+            * (cf. IEEE 802.11-2012 8.2.4.1.7 Power Management field)
+            */
+           (!ieee80211_is_mgmt(hdr->frame_control) ||
+            ieee80211_is_bufferable_mmpdu(hdr->frame_control))) {
                if (test_sta_flag(sta, WLAN_STA_PS_STA)) {
-                       /*
-                        * Ignore doze->wake transitions that are
-                        * indicated by non-data frames, the standard
-                        * is unclear here, but for example going to
-                        * PS mode and then scanning would cause a
-                        * doze->wake transition for the probe request,
-                        * and that is clearly undesirable.
-                        */
-                       if (ieee80211_is_data(hdr->frame_control) &&
-                           !ieee80211_has_pm(hdr->frame_control))
+                       if (!ieee80211_has_pm(hdr->frame_control))
                                sta_ps_end(sta);
                } else {
                        if (ieee80211_has_pm(hdr->frame_control))
@@ -1845,8 +1849,7 @@ static int ieee80211_drop_unencrypted_mg
                 * having configured keys.
                 */
                if (unlikely(ieee80211_is_action(fc) && !rx->key &&
-                            ieee80211_is_robust_mgmt_frame(
-                                    (struct ieee80211_hdr *) rx->skb->data)))
+                            ieee80211_is_robust_mgmt_frame(rx->skb)))
                        return -EACCES;
        }
 
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -452,8 +452,7 @@ static int ieee80211_use_mfp(__le16 fc, 
        if (sta == NULL || !test_sta_flag(sta, WLAN_STA_MFP))
                return 0;
 
-       if (!ieee80211_is_robust_mgmt_frame((struct ieee80211_hdr *)
-                                           skb->data))
+       if (!ieee80211_is_robust_mgmt_frame(skb))
                return 0;
 
        return 1;
@@ -478,6 +477,20 @@ ieee80211_tx_h_unicast_ps_buf(struct iee
                       sta->sta.addr, sta->sta.aid, ac);
                if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
                        purge_old_ps_buffers(tx->local);
+
+               /* sync with ieee80211_sta_ps_deliver_wakeup */
+               spin_lock(&sta->ps_lock);
+               /*
+                * STA woke up the meantime and all the frames on ps_tx_buf have
+                * been queued to pending queue. No reordering can happen, go
+                * ahead and Tx the packet.
+                */
+               if (!test_sta_flag(sta, WLAN_STA_PS_STA) &&
+                   !test_sta_flag(sta, WLAN_STA_PS_DRIVER)) {
+                       spin_unlock(&sta->ps_lock);
+                       return TX_CONTINUE;
+               }
+
                if (skb_queue_len(&sta->ps_tx_buf[ac]) >= STA_MAX_TX_BUFFER) {
                        struct sk_buff *old = skb_dequeue(&sta->ps_tx_buf[ac]);
                        ps_dbg(tx->sdata,
@@ -492,6 +505,7 @@ ieee80211_tx_h_unicast_ps_buf(struct iee
                info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING;
                info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
                skb_queue_tail(&sta->ps_tx_buf[ac], tx->skb);
+               spin_unlock(&sta->ps_lock);
 
                if (!timer_pending(&local->sta_cleanup))
                        mod_timer(&local->sta_cleanup,
@@ -525,9 +539,7 @@ ieee80211_tx_h_ps_buf(struct ieee80211_t
 
        /* only deauth, disassoc and action are bufferable MMPDUs */
        if (ieee80211_is_mgmt(hdr->frame_control) &&
-           !ieee80211_is_deauth(hdr->frame_control) &&
-           !ieee80211_is_disassoc(hdr->frame_control) &&
-           !ieee80211_is_action(hdr->frame_control)) {
+           !ieee80211_is_bufferable_mmpdu(hdr->frame_control)) {
                if (tx->flags & IEEE80211_TX_UNICAST)
                        info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER;
                return TX_CONTINUE;
@@ -567,7 +579,7 @@ ieee80211_tx_h_select_key(struct ieee802
                tx->key = key;
        else if (ieee80211_is_mgmt(hdr->frame_control) &&
                 is_multicast_ether_addr(hdr->addr1) &&
-                ieee80211_is_robust_mgmt_frame(hdr) &&
+                ieee80211_is_robust_mgmt_frame(tx->skb) &&
                 (key = rcu_dereference(tx->sdata->default_mgmt_key)))
                tx->key = key;
        else if (is_multicast_ether_addr(hdr->addr1) &&
@@ -582,12 +594,12 @@ ieee80211_tx_h_select_key(struct ieee802
                tx->key = NULL;
        else if (tx->skb->protocol == tx->sdata->control_port_protocol)
                tx->key = NULL;
-       else if (ieee80211_is_robust_mgmt_frame(hdr) &&
+       else if (ieee80211_is_robust_mgmt_frame(tx->skb) &&
                 !(ieee80211_is_action(hdr->frame_control) &&
                   tx->sta && test_sta_flag(tx->sta, WLAN_STA_MFP)))
                tx->key = NULL;
        else if (ieee80211_is_mgmt(hdr->frame_control) &&
-                !ieee80211_is_robust_mgmt_frame(hdr))
+                !ieee80211_is_robust_mgmt_frame(tx->skb))
                tx->key = NULL;
        else {
                I802_DEBUG_INC(tx->local->tx_handlers_drop_unencrypted);
@@ -878,7 +890,7 @@ static int ieee80211_fragment(struct iee
        }
 
        /* adjust first fragment's length */
-       skb->len = hdrlen + per_fragm;
+       skb_trim(skb, hdrlen + per_fragm);
        return 0;
 }
 
--- a/net/mac80211/wpa.c
+++ b/net/mac80211/wpa.c
@@ -499,7 +499,7 @@ ieee80211_crypto_ccmp_decrypt(struct iee
        hdrlen = ieee80211_hdrlen(hdr->frame_control);
 
        if (!ieee80211_is_data(hdr->frame_control) &&
-           !ieee80211_is_robust_mgmt_frame(hdr))
+           !ieee80211_is_robust_mgmt_frame(skb))
                return RX_CONTINUE;
 
        data_len = skb->len - hdrlen - IEEE80211_CCMP_HDR_LEN -
--- a/net/wireless/ap.c
+++ b/net/wireless/ap.c
@@ -27,9 +27,10 @@ static int __cfg80211_stop_ap(struct cfg
        err = rdev_stop_ap(rdev, dev);
        if (!err) {
                wdev->beacon_interval = 0;
-               wdev->channel = NULL;
+               memset(&wdev->chandef, 0, sizeof(wdev->chandef));
                wdev->ssid_len = 0;
                rdev_set_qos_map(rdev, dev, NULL);
+               nl80211_send_ap_stopped(wdev);
        }
 
        return err;
--- a/net/wireless/core.c
+++ b/net/wireless/core.c
@@ -203,8 +203,11 @@ void cfg80211_stop_p2p_device(struct cfg
 
        rdev->opencount--;
 
-       WARN_ON(rdev->scan_req && rdev->scan_req->wdev == wdev &&
-               !rdev->scan_req->notified);
+       if (rdev->scan_req && rdev->scan_req->wdev == wdev) {
+               if (WARN_ON(!rdev->scan_req->notified))
+                       rdev->scan_req->aborted = true;
+               ___cfg80211_scan_done(rdev, false);
+       }
 }
 
 static int cfg80211_rfkill_set_block(void *data, bool blocked)
@@ -447,9 +450,6 @@ int wiphy_register(struct wiphy *wiphy)
        int i;
        u16 ifmodes = wiphy->interface_modes;
 
-       /* support for 5/10 MHz is broken due to nl80211 API mess - disable */
-       wiphy->flags &= ~WIPHY_FLAG_SUPPORTS_5_10_MHZ;
-
        /*
         * There are major locking problems in nl80211/mac80211 for CSA,
         * disable for all drivers until this has been reworked.
@@ -875,8 +875,11 @@ static int cfg80211_netdev_notifier_call
                break;
        case NETDEV_DOWN:
                cfg80211_update_iface_num(rdev, wdev->iftype, -1);
-               WARN_ON(rdev->scan_req && rdev->scan_req->wdev == wdev &&
-                       !rdev->scan_req->notified);
+               if (rdev->scan_req && rdev->scan_req->wdev == wdev) {
+                       if (WARN_ON(!rdev->scan_req->notified))
+                               rdev->scan_req->aborted = true;
+                       ___cfg80211_scan_done(rdev, false);
+               }
 
                if (WARN_ON(rdev->sched_scan_req &&
                            rdev->sched_scan_req->dev == wdev->netdev)) {
--- a/net/wireless/core.h
+++ b/net/wireless/core.h
@@ -62,6 +62,7 @@ struct cfg80211_registered_device {
        struct rb_root bss_tree;
        u32 bss_generation;
        struct cfg80211_scan_request *scan_req; /* protected by RTNL */
+       struct sk_buff *scan_msg;
        struct cfg80211_sched_scan_request *sched_scan_req;
        unsigned long suspend_at;
        struct work_struct scan_done_wk;
@@ -210,6 +211,7 @@ struct cfg80211_event {
                } dc;
                struct {
                        u8 bssid[ETH_ALEN];
+                       struct ieee80211_channel *channel;
                } ij;
        };
 };
@@ -257,7 +259,8 @@ int __cfg80211_leave_ibss(struct cfg8021
                          struct net_device *dev, bool nowext);
 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
                        struct net_device *dev, bool nowext);
-void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid);
+void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid,
+                           struct ieee80211_channel *channel);
 int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
                            struct wireless_dev *wdev);
 
@@ -361,7 +364,8 @@ int cfg80211_validate_key_settings(struc
                                   struct key_params *params, int key_idx,
                                   bool pairwise, const u8 *mac_addr);
 void __cfg80211_scan_done(struct work_struct *wk);
-void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev);
+void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev,
+                          bool send_message);
 void __cfg80211_sched_scan_results(struct work_struct *wk);
 int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev,
                               bool driver_initiated);
@@ -441,7 +445,8 @@ static inline unsigned int elapsed_jiffi
 void
 cfg80211_get_chan_state(struct wireless_dev *wdev,
                        struct ieee80211_channel **chan,
-                       enum cfg80211_chan_mode *chanmode);
+                       enum cfg80211_chan_mode *chanmode,
+                       u8 *radar_detect);
 
 int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev,
                                 struct cfg80211_chan_def *chandef);
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -1723,9 +1723,10 @@ static int nl80211_dump_wiphy(struct sk_
                                 * We can then retry with the larger buffer.
                                 */
                                if ((ret == -ENOBUFS || ret == -EMSGSIZE) &&
-                                   !skb->len &&
+                                   !skb->len && !state->split &&
                                    cb->min_dump_alloc < 4096) {
                                        cb->min_dump_alloc = 4096;
+                                       state->split_start = 0;
                                        rtnl_unlock();
                                        return 1;
                                }
@@ -2047,10 +2048,12 @@ static int nl80211_set_wiphy(struct sk_b
                nla_for_each_nested(nl_txq_params,
                                    info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
                                    rem_txq_params) {
-                       nla_parse(tb, NL80211_TXQ_ATTR_MAX,
-                                 nla_data(nl_txq_params),
-                                 nla_len(nl_txq_params),
-                                 txq_params_policy);
+                       result = nla_parse(tb, NL80211_TXQ_ATTR_MAX,
+                                          nla_data(nl_txq_params),
+                                          nla_len(nl_txq_params),
+                                          txq_params_policy);
+                       if (result)
+                               goto bad_res;
                        result = parse_txq_params(tb, &txq_params);
                        if (result)
                                goto bad_res;
@@ -3289,7 +3292,7 @@ static int nl80211_start_ap(struct sk_bu
        if (!err) {
                wdev->preset_chandef = params.chandef;
                wdev->beacon_interval = params.beacon_interval;
-               wdev->channel = params.chandef.chan;
+               wdev->chandef = params.chandef;
                wdev->ssid_len = params.ssid_len;
                memcpy(wdev->ssid, params.ssid, wdev->ssid_len);
        }
@@ -5210,9 +5213,11 @@ static int nl80211_set_reg(struct sk_buf
 
        nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
                            rem_reg_rules) {
-               nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
-                         nla_data(nl_reg_rule), nla_len(nl_reg_rule),
-                         reg_rule_policy);
+               r = nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
+                             nla_data(nl_reg_rule), nla_len(nl_reg_rule),
+                             reg_rule_policy);
+               if (r)
+                       goto bad_reg;
                r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
                if (r)
                        goto bad_reg;
@@ -5277,7 +5282,7 @@ static int nl80211_trigger_scan(struct s
        if (!rdev->ops->scan)
                return -EOPNOTSUPP;
 
-       if (rdev->scan_req) {
+       if (rdev->scan_req || rdev->scan_msg) {
                err = -EBUSY;
                goto unlock;
        }
@@ -5475,6 +5480,7 @@ static int nl80211_start_sched_scan(stru
        enum ieee80211_band band;
        size_t ie_len;
        struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
+       s32 default_match_rssi = NL80211_SCAN_RSSI_THOLD_OFF;
 
        if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
            !rdev->ops->sched_scan_start)
@@ -5509,11 +5515,40 @@ static int nl80211_start_sched_scan(stru
        if (n_ssids > wiphy->max_sched_scan_ssids)
                return -EINVAL;
 
-       if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH])
+       /*
+        * First, count the number of 'real' matchsets. Due to an issue with
+        * the old implementation, matchsets containing only the RSSI attribute
+        * (NL80211_SCHED_SCAN_MATCH_ATTR_RSSI) are considered as the 'default'
+        * RSSI for all matchsets, rather than their own matchset for reporting
+        * all APs with a strong RSSI. This is needed to be compatible with
+        * older userspace that treated a matchset with only the RSSI as the
+        * global RSSI for all other matchsets - if there are other matchsets.
+        */
+       if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
                nla_for_each_nested(attr,
                                    info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
-                                   tmp)
-                       n_match_sets++;
+                                   tmp) {
+                       struct nlattr *rssi;
+
+                       err = nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
+                                       nla_data(attr), nla_len(attr),
+                                       nl80211_match_policy);
+                       if (err)
+                               return err;
+                       /* add other standalone attributes here */
+                       if (tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID]) {
+                               n_match_sets++;
+                               continue;
+                       }
+                       rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
+                       if (rssi)
+                               default_match_rssi = nla_get_s32(rssi);
+               }
+       }
+
+       /* However, if there's no other matchset, add the RSSI one */
+       if (!n_match_sets && default_match_rssi != NL80211_SCAN_RSSI_THOLD_OFF)
+               n_match_sets = 1;
 
        if (n_match_sets > wiphy->max_match_sets)
                return -EINVAL;
@@ -5634,11 +5669,22 @@ static int nl80211_start_sched_scan(stru
                                    tmp) {
                        struct nlattr *ssid, *rssi;
 
-                       nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
-                                 nla_data(attr), nla_len(attr),
-                                 nl80211_match_policy);
+                       err = nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
+                                       nla_data(attr), nla_len(attr),
+                                       nl80211_match_policy);
+                       if (err)
+                               goto out_free;
                        ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
                        if (ssid) {
+                               if (WARN_ON(i >= n_match_sets)) {
+                                       /* this indicates a programming error,
+                                        * the loop above should have verified
+                                        * things properly
+                                        */
+                                       err = -EINVAL;
+                                       goto out_free;
+                               }
+
                                if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
                                        err = -EINVAL;
                                        goto out_free;
@@ -5647,15 +5693,28 @@ static int nl80211_start_sched_scan(stru
                                       nla_data(ssid), nla_len(ssid));
                                request->match_sets[i].ssid.ssid_len =
                                        nla_len(ssid);
+                               /* special attribute - old implemenation w/a */
+                               request->match_sets[i].rssi_thold =
+                                       default_match_rssi;
+                               rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
+                               if (rssi)
+                                       request->match_sets[i].rssi_thold =
+                                               nla_get_s32(rssi);
                        }
-                       rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
-                       if (rssi)
-                               request->rssi_thold = nla_get_u32(rssi);
-                       else
-                               request->rssi_thold =
-                                                  NL80211_SCAN_RSSI_THOLD_OFF;
                        i++;
                }
+
+               /* there was no other matchset, so the RSSI one is alone */
+               if (i == 0)
+                       request->match_sets[0].rssi_thold = default_match_rssi;
+
+               request->min_rssi_thold = INT_MAX;
+               for (i = 0; i < n_match_sets; i++)
+                       request->min_rssi_thold =
+                               min(request->match_sets[i].rssi_thold,
+                                   request->min_rssi_thold);
+       } else {
+               request->min_rssi_thold = NL80211_SCAN_RSSI_THOLD_OFF;
        }
 
        if (info->attrs[NL80211_ATTR_IE]) {
@@ -5751,7 +5810,7 @@ static int nl80211_start_radar_detection
 
        err = rdev->ops->start_radar_detection(&rdev->wiphy, dev, &chandef);
        if (!err) {
-               wdev->channel = chandef.chan;
+               wdev->chandef = chandef;
                wdev->cac_started = true;
                wdev->cac_start_time = jiffies;
        }
@@ -7502,16 +7561,19 @@ static int nl80211_set_tx_bitrate_mask(s
         * directly to the enum ieee80211_band values used in cfg80211.
         */
        BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
-       nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
-       {
+       nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem) {
                enum ieee80211_band band = nla_type(tx_rates);
+               int err;
+
                if (band < 0 || band >= IEEE80211_NUM_BANDS)
                        return -EINVAL;
                sband = rdev->wiphy.bands[band];
                if (sband == NULL)
                        return -EINVAL;
-               nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
-                         nla_len(tx_rates), nl80211_txattr_policy);
+               err = nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
+                               nla_len(tx_rates), nl80211_txattr_policy);
+               if (err)
+                       return err;
                if (tb[NL80211_TXRATE_LEGACY]) {
                        mask.control[band].legacy = rateset_to_mask(
                                sband,
@@ -10054,40 +10116,31 @@ void nl80211_send_scan_start(struct cfg8
                                NL80211_MCGRP_SCAN, GFP_KERNEL);
 }
 
-void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
-                           struct wireless_dev *wdev)
+struct sk_buff *nl80211_build_scan_msg(struct cfg80211_registered_device *rdev,
+                                      struct wireless_dev *wdev, bool aborted)
 {
        struct sk_buff *msg;
 
        msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
        if (!msg)
-               return;
+               return NULL;
 
        if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
-                                 NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
+                                 aborted ? NL80211_CMD_SCAN_ABORTED :
+                                           NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
                nlmsg_free(msg);
-               return;
+               return NULL;
        }
 
-       genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
-                               NL80211_MCGRP_SCAN, GFP_KERNEL);
+       return msg;
 }
 
-void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
-                              struct wireless_dev *wdev)
+void nl80211_send_scan_result(struct cfg80211_registered_device *rdev,
+                             struct sk_buff *msg)
 {
-       struct sk_buff *msg;
-
-       msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
        if (!msg)
                return;
 
-       if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
-                                 NL80211_CMD_SCAN_ABORTED) < 0) {
-               nlmsg_free(msg);
-               return;
-       }
-
        genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
                                NL80211_MCGRP_SCAN, GFP_KERNEL);
 }
@@ -11158,7 +11211,8 @@ void cfg80211_ch_switch_notify(struct ne
                    wdev->iftype != NL80211_IFTYPE_MESH_POINT))
                return;
 
-       wdev->channel = chandef->chan;
+       wdev->chandef = *chandef;
+       wdev->preset_chandef = *chandef;
        nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL);
 }
 EXPORT_SYMBOL(cfg80211_ch_switch_notify);
@@ -11673,6 +11727,35 @@ void cfg80211_crit_proto_stopped(struct 
 }
 EXPORT_SYMBOL(cfg80211_crit_proto_stopped);
 
+void nl80211_send_ap_stopped(struct wireless_dev *wdev)
+{
+       struct wiphy *wiphy = wdev->wiphy;
+       struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
+       struct sk_buff *msg;
+       void *hdr;
+
+       msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+       if (!msg)
+               return;
+
+       hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_STOP_AP);
+       if (!hdr)
+               goto out;
+
+       if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
+           nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex) ||
+           nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
+               goto out;
+
+       genlmsg_end(msg, hdr);
+
+       genlmsg_multicast_netns(&nl80211_fam, wiphy_net(wiphy), msg, 0,
+                               NL80211_MCGRP_MLME, GFP_KERNEL);
+       return;
+ out:
+       nlmsg_free(msg);
+}
+
 /* initialisation/exit functions */
 
 int nl80211_init(void)
--- a/net/wireless/nl80211.h
+++ b/net/wireless/nl80211.h
@@ -8,10 +8,10 @@ void nl80211_exit(void);
 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev);
 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
                             struct wireless_dev *wdev);
-void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
-                           struct wireless_dev *wdev);
-void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
-                              struct wireless_dev *wdev);
+struct sk_buff *nl80211_build_scan_msg(struct cfg80211_registered_device *rdev,
+                                      struct wireless_dev *wdev, bool aborted);
+void nl80211_send_scan_result(struct cfg80211_registered_device *rdev,
+                             struct sk_buff *msg);
 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
                             struct net_device *netdev, u32 cmd);
 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
@@ -74,6 +74,8 @@ nl80211_radar_notify(struct cfg80211_reg
                     enum nl80211_radar_event event,
                     struct net_device *netdev, gfp_t gfp);
 
+void nl80211_send_ap_stopped(struct wireless_dev *wdev);
+
 void cfg80211_rdev_free_coalesce(struct cfg80211_registered_device *rdev);
 
 #endif /* __NET_WIRELESS_NL80211_H */
--- a/net/wireless/scan.c
+++ b/net/wireless/scan.c
@@ -161,18 +161,25 @@ static void __cfg80211_bss_expire(struct
                dev->bss_generation++;
 }
 
-void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev)
+void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev,
+                          bool send_message)
 {
        struct cfg80211_scan_request *request;
        struct wireless_dev *wdev;
+       struct sk_buff *msg;
 #ifdef CPTCFG_CFG80211_WEXT
        union iwreq_data wrqu;
 #endif
 
        ASSERT_RTNL();
 
-       request = rdev->scan_req;
+       if (rdev->scan_msg) {
+               nl80211_send_scan_result(rdev, rdev->scan_msg);
+               rdev->scan_msg = NULL;
+               return;
+       }
 
+       request = rdev->scan_req;
        if (!request)
                return;
 
@@ -186,18 +193,16 @@ void ___cfg80211_scan_done(struct cfg802
        if (wdev->netdev)
                cfg80211_sme_scan_done(wdev->netdev);
 
-       if (request->aborted) {
-               nl80211_send_scan_aborted(rdev, wdev);
-       } else {
-               if (request->flags & NL80211_SCAN_FLAG_FLUSH) {
-                       /* flush entries from previous scans */
-                       spin_lock_bh(&rdev->bss_lock);
-                       __cfg80211_bss_expire(rdev, request->scan_start);
-                       spin_unlock_bh(&rdev->bss_lock);
-               }
-               nl80211_send_scan_done(rdev, wdev);
+       if (!request->aborted &&
+           request->flags & NL80211_SCAN_FLAG_FLUSH) {
+               /* flush entries from previous scans */
+               spin_lock_bh(&rdev->bss_lock);
+               __cfg80211_bss_expire(rdev, request->scan_start);
+               spin_unlock_bh(&rdev->bss_lock);
        }
 
+       msg = nl80211_build_scan_msg(rdev, wdev, request->aborted);
+
 #ifdef CPTCFG_CFG80211_WEXT
        if (wdev->netdev && !request->aborted) {
                memset(&wrqu, 0, sizeof(wrqu));
@@ -211,6 +216,11 @@ void ___cfg80211_scan_done(struct cfg802
 
        rdev->scan_req = NULL;
        kfree(request);
+
+       if (!send_message)
+               rdev->scan_msg = msg;
+       else
+               nl80211_send_scan_result(rdev, msg);
 }
 
 void __cfg80211_scan_done(struct work_struct *wk)
@@ -221,7 +231,7 @@ void __cfg80211_scan_done(struct work_st
                            scan_done_wk);
 
        rtnl_lock();
-       ___cfg80211_scan_done(rdev);
+       ___cfg80211_scan_done(rdev, true);
        rtnl_unlock();
 }
 
@@ -1079,7 +1089,7 @@ int cfg80211_wext_siwscan(struct net_dev
        if (IS_ERR(rdev))
                return PTR_ERR(rdev);
 
-       if (rdev->scan_req) {
+       if (rdev->scan_req || rdev->scan_msg) {
                err = -EBUSY;
                goto out;
        }
@@ -1481,7 +1491,7 @@ int cfg80211_wext_giwscan(struct net_dev
        if (IS_ERR(rdev))
                return PTR_ERR(rdev);
 
-       if (rdev->scan_req)
+       if (rdev->scan_req || rdev->scan_msg)
                return -EAGAIN;
 
        res = ieee80211_scan_results(rdev, info, extra, data->length);
--- a/net/wireless/sme.c
+++ b/net/wireless/sme.c
@@ -67,7 +67,7 @@ static int cfg80211_conn_scan(struct wir
        ASSERT_RDEV_LOCK(rdev);
        ASSERT_WDEV_LOCK(wdev);
 
-       if (rdev->scan_req)
+       if (rdev->scan_req || rdev->scan_msg)
                return -EBUSY;
 
        if (wdev->conn->params.channel)
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -1001,7 +1001,6 @@ ieee80211_sta_process_chanswitch(struct 
        }
 
        ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
-       sdata->vif.csa_active = true;
 
        mutex_lock(&local->chanctx_mtx);
        if (local->use_chanctx) {
@@ -1039,6 +1038,7 @@ ieee80211_sta_process_chanswitch(struct 
        mutex_unlock(&local->chanctx_mtx);
 
        sdata->csa_chandef = csa_ie.chandef;
+       sdata->vif.csa_active = true;
 
        if (csa_ie.mode)
                ieee80211_stop_queues_by_reason(&local->hw,
--- a/net/mac80211/chan.c
+++ b/net/mac80211/chan.c
@@ -196,6 +196,8 @@ static bool ieee80211_is_radar_required(
 {
        struct ieee80211_sub_if_data *sdata;
 
+       lockdep_assert_held(&local->mtx);
+
        rcu_read_lock();
        list_for_each_entry_rcu(sdata, &local->interfaces, list) {
                if (sdata->radar_required) {
--- a/net/mac80211/ibss.c
+++ b/net/mac80211/ibss.c
@@ -294,7 +294,6 @@ static void __ieee80211_sta_join_ibss(st
        }
 
        mutex_lock(&local->mtx);
-       ieee80211_vif_release_channel(sdata);
        if (ieee80211_vif_use_channel(sdata, &chandef,
                                      ifibss->fixed_channel ?
                                        IEEE80211_CHANCTX_SHARED :
@@ -303,6 +302,7 @@ static void __ieee80211_sta_join_ibss(st
                mutex_unlock(&local->mtx);
                return;
        }
+       sdata->radar_required = radar_required;
        mutex_unlock(&local->mtx);
 
        memcpy(ifibss->bssid, bssid, ETH_ALEN);
@@ -318,7 +318,6 @@ static void __ieee80211_sta_join_ibss(st
        rcu_assign_pointer(ifibss->presp, presp);
        mgmt = (void *)presp->head;
 
-       sdata->radar_required = radar_required;
        sdata->vif.bss_conf.enable_beacon = true;
        sdata->vif.bss_conf.beacon_int = beacon_int;
        sdata->vif.bss_conf.basic_rates = basic_rates;
@@ -386,7 +385,7 @@ static void __ieee80211_sta_join_ibss(st
                                              presp->head_len, 0, GFP_KERNEL);
        cfg80211_put_bss(local->hw.wiphy, bss);
        netif_carrier_on(sdata->dev);
-       cfg80211_ibss_joined(sdata->dev, ifibss->bssid, GFP_KERNEL);
+       cfg80211_ibss_joined(sdata->dev, ifibss->bssid, chan, GFP_KERNEL);
 }
 
 static void ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
@@ -802,6 +801,8 @@ ieee80211_ibss_process_chanswitch(struct
        int err;
        u32 sta_flags;
 
+       sdata_assert_lock(sdata);
+
        sta_flags = IEEE80211_STA_DISABLE_VHT;
        switch (ifibss->chandef.width) {
        case NL80211_CHAN_WIDTH_5:
@@ -1471,6 +1472,11 @@ static void ieee80211_rx_mgmt_probe_req(
        memcpy(((struct ieee80211_mgmt *) skb->data)->da, mgmt->sa, ETH_ALEN);
        ibss_dbg(sdata, "Sending ProbeResp to %pM\n", mgmt->sa);
        IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
+
+       /* avoid excessive retries for probe request to wildcard SSIDs */
+       if (pos[1] == 0)
+               IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_NO_ACK;
+
        ieee80211_tx_skb(sdata, skb);
 }
 
--- a/net/mac80211/mesh.c
+++ b/net/mac80211/mesh.c
@@ -872,6 +872,8 @@ ieee80211_mesh_process_chnswitch(struct 
        if (!ifmsh->mesh_id)
                return false;
 
+       sdata_assert_lock(sdata);
+
        sta_flags = IEEE80211_STA_DISABLE_VHT;
        switch (sdata->vif.bss_conf.chandef.width) {
        case NL80211_CHAN_WIDTH_20_NOHT:
--- a/drivers/net/wireless/brcm80211/brcmfmac/wl_cfg80211.c
+++ b/drivers/net/wireless/brcm80211/brcmfmac/wl_cfg80211.c
@@ -4658,6 +4658,7 @@ brcmf_notify_connect_status(struct brcmf
        struct brcmf_cfg80211_info *cfg = ifp->drvr->config;
        struct net_device *ndev = ifp->ndev;
        struct brcmf_cfg80211_profile *profile = &ifp->vif->profile;
+       struct ieee80211_channel *chan;
        s32 err = 0;
 
        if (ifp->vif->mode == WL_MODE_AP) {
@@ -4665,9 +4666,10 @@ brcmf_notify_connect_status(struct brcmf
        } else if (brcmf_is_linkup(e)) {
                brcmf_dbg(CONN, "Linkup\n");
                if (brcmf_is_ibssmode(ifp->vif)) {
+                       chan = ieee80211_get_channel(cfg->wiphy, cfg->channel);
                        memcpy(profile->bssid, e->addr, ETH_ALEN);
                        wl_inform_ibss(cfg, ndev, e->addr);
-                       cfg80211_ibss_joined(ndev, e->addr, GFP_KERNEL);
+                       cfg80211_ibss_joined(ndev, e->addr, chan, GFP_KERNEL);
                        clear_bit(BRCMF_VIF_STATUS_CONNECTING,
                                  &ifp->vif->sme_state);
                        set_bit(BRCMF_VIF_STATUS_CONNECTED,
--- a/drivers/net/wireless/libertas/cfg.c
+++ b/drivers/net/wireless/libertas/cfg.c
@@ -1766,7 +1766,8 @@ static void lbs_join_post(struct lbs_pri
        memcpy(priv->wdev->ssid, params->ssid, params->ssid_len);
        priv->wdev->ssid_len = params->ssid_len;
 
-       cfg80211_ibss_joined(priv->dev, bssid, GFP_KERNEL);
+       cfg80211_ibss_joined(priv->dev, bssid, params->chandef.chan,
+                            GFP_KERNEL);
 
        /* TODO: consider doing this at MACREG_INT_CODE_LINK_SENSED time */
        priv->connect_status = LBS_CONNECTED;
--- a/drivers/net/wireless/mwifiex/cfg80211.c
+++ b/drivers/net/wireless/mwifiex/cfg80211.c
@@ -1881,7 +1881,8 @@ mwifiex_cfg80211_join_ibss(struct wiphy 
                                     params->privacy);
 done:
        if (!ret) {
-               cfg80211_ibss_joined(priv->netdev, priv->cfg_bssid, GFP_KERNEL);
+               cfg80211_ibss_joined(priv->netdev, priv->cfg_bssid,
+                                    params->chandef.chan, GFP_KERNEL);
                dev_dbg(priv->adapter->dev,
                        "info: joined/created adhoc network with bssid"
                        " %pM successfully\n", priv->cfg_bssid);
--- a/drivers/net/wireless/rndis_wlan.c
+++ b/drivers/net/wireless/rndis_wlan.c
@@ -2835,7 +2835,9 @@ static void rndis_wlan_do_link_up_work(s
                                        bssid, req_ie, req_ie_len,
                                        resp_ie, resp_ie_len, GFP_KERNEL);
        } else if (priv->infra_mode == NDIS_80211_INFRA_ADHOC)
-               cfg80211_ibss_joined(usbdev->net, bssid, GFP_KERNEL);
+               cfg80211_ibss_joined(usbdev->net, bssid,
+                                    get_current_channel(usbdev, NULL),
+                                    GFP_KERNEL);
 
        kfree(info);
 
--- a/net/wireless/ibss.c
+++ b/net/wireless/ibss.c
@@ -14,7 +14,8 @@
 #include "rdev-ops.h"
 
 
-void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid)
+void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid,
+                           struct ieee80211_channel *channel)
 {
        struct wireless_dev *wdev = dev->ieee80211_ptr;
        struct cfg80211_bss *bss;
@@ -28,8 +29,7 @@ void __cfg80211_ibss_joined(struct net_d
        if (!wdev->ssid_len)
                return;
 
-       bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid,
-                              wdev->ssid, wdev->ssid_len,
+       bss = cfg80211_get_bss(wdev->wiphy, channel, bssid, NULL, 0,
                               WLAN_CAPABILITY_IBSS, WLAN_CAPABILITY_IBSS);
 
        if (WARN_ON(!bss))
@@ -54,21 +54,26 @@ void __cfg80211_ibss_joined(struct net_d
 #endif
 }
 
-void cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid, gfp_t gfp)
+void cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid,
+                         struct ieee80211_channel *channel, gfp_t gfp)
 {
        struct wireless_dev *wdev = dev->ieee80211_ptr;
        struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
        struct cfg80211_event *ev;
        unsigned long flags;
 
-       trace_cfg80211_ibss_joined(dev, bssid);
+       trace_cfg80211_ibss_joined(dev, bssid, channel);
+
+       if (WARN_ON(!channel))
+               return;
 
        ev = kzalloc(sizeof(*ev), gfp);
        if (!ev)
                return;
 
        ev->type = EVENT_IBSS_JOINED;
-       memcpy(ev->cr.bssid, bssid, ETH_ALEN);
+       memcpy(ev->ij.bssid, bssid, ETH_ALEN);
+       ev->ij.channel = channel;
 
        spin_lock_irqsave(&wdev->event_lock, flags);
        list_add_tail(&ev->list, &wdev->event_list);
@@ -117,6 +122,7 @@ int __cfg80211_join_ibss(struct cfg80211
 
        wdev->ibss_fixed = params->channel_fixed;
        wdev->ibss_dfs_possible = params->userspace_handles_dfs;
+       wdev->chandef = params->chandef;
 #ifdef CPTCFG_CFG80211_WEXT
        wdev->wext.ibss.chandef = params->chandef;
 #endif
@@ -200,6 +206,7 @@ static void __cfg80211_clear_ibss(struct
 
        wdev->current_bss = NULL;
        wdev->ssid_len = 0;
+       memset(&wdev->chandef, 0, sizeof(wdev->chandef));
 #ifdef CPTCFG_CFG80211_WEXT
        if (!nowext)
                wdev->wext.ibss.ssid_len = 0;
--- a/net/wireless/trace.h
+++ b/net/wireless/trace.h
@@ -2278,11 +2278,6 @@ DECLARE_EVENT_CLASS(cfg80211_rx_evt,
        TP_printk(NETDEV_PR_FMT ", " MAC_PR_FMT, NETDEV_PR_ARG, MAC_PR_ARG(addr))
 );
 
-DEFINE_EVENT(cfg80211_rx_evt, cfg80211_ibss_joined,
-       TP_PROTO(struct net_device *netdev, const u8 *addr),
-       TP_ARGS(netdev, addr)
-);
-
 DEFINE_EVENT(cfg80211_rx_evt, cfg80211_rx_spurious_frame,
        TP_PROTO(struct net_device *netdev, const u8 *addr),
        TP_ARGS(netdev, addr)
@@ -2293,6 +2288,24 @@ DEFINE_EVENT(cfg80211_rx_evt, cfg80211_r
        TP_ARGS(netdev, addr)
 );
 
+TRACE_EVENT(cfg80211_ibss_joined,
+       TP_PROTO(struct net_device *netdev, const u8 *bssid,
+                struct ieee80211_channel *channel),
+       TP_ARGS(netdev, bssid, channel),
+       TP_STRUCT__entry(
+               NETDEV_ENTRY
+               MAC_ENTRY(bssid)
+               CHAN_ENTRY
+       ),
+       TP_fast_assign(
+               NETDEV_ASSIGN;
+               MAC_ASSIGN(bssid, bssid);
+               CHAN_ASSIGN(channel);
+       ),
+       TP_printk(NETDEV_PR_FMT ", bssid: " MAC_PR_FMT ", " CHAN_PR_FMT,
+                 NETDEV_PR_ARG, MAC_PR_ARG(bssid), CHAN_PR_ARG)
+);
+
 TRACE_EVENT(cfg80211_probe_status,
        TP_PROTO(struct net_device *netdev, const u8 *addr, u64 cookie,
                 bool acked),
--- a/net/wireless/util.c
+++ b/net/wireless/util.c
@@ -820,7 +820,8 @@ void cfg80211_process_wdev_events(struct
                                                ev->dc.reason, true);
                        break;
                case EVENT_IBSS_JOINED:
-                       __cfg80211_ibss_joined(wdev->netdev, ev->ij.bssid);
+                       __cfg80211_ibss_joined(wdev->netdev, ev->ij.bssid,
+                                              ev->ij.channel);
                        break;
                }
                wdev_unlock(wdev);
@@ -1356,7 +1357,7 @@ int cfg80211_can_use_iftype_chan(struct 
                 */
                mutex_lock_nested(&wdev_iter->mtx, 1);
                __acquire(wdev_iter->mtx);
-               cfg80211_get_chan_state(wdev_iter, &ch, &chmode);
+               cfg80211_get_chan_state(wdev_iter, &ch, &chmode, &radar_detect);
                wdev_unlock(wdev_iter);
 
                switch (chmode) {
--- a/net/wireless/chan.c
+++ b/net/wireless/chan.c
@@ -642,7 +642,8 @@ int cfg80211_set_monitor_channel(struct 
 void
 cfg80211_get_chan_state(struct wireless_dev *wdev,
                        struct ieee80211_channel **chan,
-                       enum cfg80211_chan_mode *chanmode)
+                       enum cfg80211_chan_mode *chanmode,
+                       u8 *radar_detect)
 {
        *chan = NULL;
        *chanmode = CHAN_MODE_UNDEFINED;
@@ -660,6 +661,11 @@ cfg80211_get_chan_state(struct wireless_
                                     !wdev->ibss_dfs_possible)
                                  ? CHAN_MODE_SHARED
                                  : CHAN_MODE_EXCLUSIVE;
+
+                       /* consider worst-case - IBSS can try to return to the
+                        * original user-specified channel as creator */
+                       if (wdev->ibss_dfs_possible)
+                               *radar_detect |= BIT(wdev->chandef.width);
                        return;
                }
                break;
@@ -674,17 +680,26 @@ cfg80211_get_chan_state(struct wireless_
        case NL80211_IFTYPE_AP:
        case NL80211_IFTYPE_P2P_GO:
                if (wdev->cac_started) {
-                       *chan = wdev->channel;
+                       *chan = wdev->chandef.chan;
                        *chanmode = CHAN_MODE_SHARED;
+                       *radar_detect |= BIT(wdev->chandef.width);
                } else if (wdev->beacon_interval) {
-                       *chan = wdev->channel;
+                       *chan = wdev->chandef.chan;
                        *chanmode = CHAN_MODE_SHARED;
+
+                       if (cfg80211_chandef_dfs_required(wdev->wiphy,
+                                                         &wdev->chandef))
+                               *radar_detect |= BIT(wdev->chandef.width);
                }
                return;
        case NL80211_IFTYPE_MESH_POINT:
                if (wdev->mesh_id_len) {
-                       *chan = wdev->channel;
+                       *chan = wdev->chandef.chan;
                        *chanmode = CHAN_MODE_SHARED;
+
+                       if (cfg80211_chandef_dfs_required(wdev->wiphy,
+                                                         &wdev->chandef))
+                               *radar_detect |= BIT(wdev->chandef.width);
                }
                return;
        case NL80211_IFTYPE_MONITOR:
--- a/net/wireless/mesh.c
+++ b/net/wireless/mesh.c
@@ -195,7 +195,7 @@ int __cfg80211_join_mesh(struct cfg80211
        if (!err) {
                memcpy(wdev->ssid, setup->mesh_id, setup->mesh_id_len);
                wdev->mesh_id_len = setup->mesh_id_len;
-               wdev->channel = setup->chandef.chan;
+               wdev->chandef = setup->chandef;
        }
 
        return err;
@@ -244,7 +244,7 @@ int cfg80211_set_mesh_channel(struct cfg
                err = rdev_libertas_set_mesh_channel(rdev, wdev->netdev,
                                                     chandef->chan);
                if (!err)
-                       wdev->channel = chandef->chan;
+                       wdev->chandef = *chandef;
 
                return err;
        }
@@ -276,7 +276,7 @@ static int __cfg80211_leave_mesh(struct 
        err = rdev_leave_mesh(rdev, dev);
        if (!err) {
                wdev->mesh_id_len = 0;
-               wdev->channel = NULL;
+               memset(&wdev->chandef, 0, sizeof(wdev->chandef));
                rdev_set_qos_map(rdev, dev, NULL);
        }
 
--- a/net/wireless/mlme.c
+++ b/net/wireless/mlme.c
@@ -772,7 +772,7 @@ void cfg80211_cac_event(struct net_devic
        if (WARN_ON(!wdev->cac_started))
                return;
 
-       if (WARN_ON(!wdev->channel))
+       if (WARN_ON(!wdev->chandef.chan))
                return;
 
        switch (event) {
--- a/drivers/net/wireless/ath/ath9k/ar9003_eeprom.c
+++ b/drivers/net/wireless/ath/ath9k/ar9003_eeprom.c
@@ -5065,6 +5065,10 @@ static u16 ar9003_hw_get_max_edge_power(
                        break;
                }
        }
+
+       if (is2GHz && !twiceMaxEdgePower)
+               twiceMaxEdgePower = 60;
+
        return twiceMaxEdgePower;
 }
 
--- a/drivers/net/wireless/ath/ath9k/ar9003_calib.c
+++ b/drivers/net/wireless/ath/ath9k/ar9003_calib.c
@@ -23,10 +23,11 @@
 #define MAX_MEASUREMENT        MAX_IQCAL_MEASUREMENT
 #define MAX_MAG_DELTA  11
 #define MAX_PHS_DELTA  10
+#define MAXIQCAL        3
 
 struct coeff {
-       int mag_coeff[AR9300_MAX_CHAINS][MAX_MEASUREMENT];
-       int phs_coeff[AR9300_MAX_CHAINS][MAX_MEASUREMENT];
+       int mag_coeff[AR9300_MAX_CHAINS][MAX_MEASUREMENT][MAXIQCAL];
+       int phs_coeff[AR9300_MAX_CHAINS][MAX_MEASUREMENT][MAXIQCAL];
        int iqc_coeff[2];
 };
 
@@ -800,7 +801,7 @@ static bool ar9003_hw_calc_iq_corr(struc
        if (q_q_coff > 63)
                q_q_coff = 63;
 
-       iqc_coeff[0] = (q_q_coff * 128) + q_i_coff;
+       iqc_coeff[0] = (q_q_coff * 128) + (0x7f & q_i_coff);
 
        ath_dbg(common, CALIBRATE, "tx chain %d: iq corr coeff=%x\n",
                chain_idx, iqc_coeff[0]);
@@ -831,7 +832,7 @@ static bool ar9003_hw_calc_iq_corr(struc
        if (q_q_coff > 63)
                q_q_coff = 63;
 
-       iqc_coeff[1] = (q_q_coff * 128) + q_i_coff;
+       iqc_coeff[1] = (q_q_coff * 128) + (0x7f & q_i_coff);
 
        ath_dbg(common, CALIBRATE, "rx chain %d: iq corr coeff=%x\n",
                chain_idx, iqc_coeff[1]);
@@ -839,7 +840,8 @@ static bool ar9003_hw_calc_iq_corr(struc
        return true;
 }
 
-static void ar9003_hw_detect_outlier(int *mp_coeff, int nmeasurement,
+static void ar9003_hw_detect_outlier(int mp_coeff[][MAXIQCAL],
+                                    int nmeasurement,
                                     int max_delta)
 {
        int mp_max = -64, max_idx = 0;
@@ -848,20 +850,20 @@ static void ar9003_hw_detect_outlier(int
 
        /* find min/max mismatch across all calibrated gains */
        for (i = 0; i < nmeasurement; i++) {
-               if (mp_coeff[i] > mp_max) {
-                       mp_max = mp_coeff[i];
+               if (mp_coeff[i][0] > mp_max) {
+                       mp_max = mp_coeff[i][0];
                        max_idx = i;
-               } else if (mp_coeff[i] < mp_min) {
-                       mp_min = mp_coeff[i];
+               } else if (mp_coeff[i][0] < mp_min) {
+                       mp_min = mp_coeff[i][0];
                        min_idx = i;
                }
        }
 
        /* find average (exclude max abs value) */
        for (i = 0; i < nmeasurement; i++) {
-               if ((abs(mp_coeff[i]) < abs(mp_max)) ||
-                   (abs(mp_coeff[i]) < abs(mp_min))) {
-                       mp_avg += mp_coeff[i];
+               if ((abs(mp_coeff[i][0]) < abs(mp_max)) ||
+                   (abs(mp_coeff[i][0]) < abs(mp_min))) {
+                       mp_avg += mp_coeff[i][0];
                        mp_count++;
                }
        }
@@ -873,7 +875,7 @@ static void ar9003_hw_detect_outlier(int
        if (mp_count)
                mp_avg /= mp_count;
        else
-               mp_avg = mp_coeff[nmeasurement - 1];
+               mp_avg = mp_coeff[nmeasurement - 1][0];
 
        /* detect outlier */
        if (abs(mp_max - mp_min) > max_delta) {
@@ -882,15 +884,16 @@ static void ar9003_hw_detect_outlier(int
                else
                        outlier_idx = min_idx;
 
-               mp_coeff[outlier_idx] = mp_avg;
+               mp_coeff[outlier_idx][0] = mp_avg;
        }
 }
 
-static void ar9003_hw_tx_iqcal_load_avg_2_passes(struct ath_hw *ah,
-                                                struct coeff *coeff,
-                                                bool is_reusable)
+static void ar9003_hw_tx_iq_cal_outlier_detection(struct ath_hw *ah,
+                                                 struct coeff *coeff,
+                                                 bool is_reusable)
 {
        int i, im, nmeasurement;
+       int magnitude, phase;
        u32 tx_corr_coeff[MAX_MEASUREMENT][AR9300_MAX_CHAINS];
        struct ath9k_hw_cal_data *caldata = ah->caldata;
 
@@ -920,21 +923,30 @@ static void ar9003_hw_tx_iqcal_load_avg_
                if (nmeasurement > MAX_MEASUREMENT)
                        nmeasurement = MAX_MEASUREMENT;
 
-               /* detect outlier only if nmeasurement > 1 */
-               if (nmeasurement > 1) {
-                       /* Detect magnitude outlier */
-                       ar9003_hw_detect_outlier(coeff->mag_coeff[i],
-                                       nmeasurement, MAX_MAG_DELTA);
-
-                       /* Detect phase outlier */
-                       ar9003_hw_detect_outlier(coeff->phs_coeff[i],
-                                       nmeasurement, MAX_PHS_DELTA);
+               /*
+                * Skip normal outlier detection for AR9550.
+                */
+               if (!AR_SREV_9550(ah)) {
+                       /* detect outlier only if nmeasurement > 1 */
+                       if (nmeasurement > 1) {
+                               /* Detect magnitude outlier */
+                               ar9003_hw_detect_outlier(coeff->mag_coeff[i],
+                                                        nmeasurement,
+                                                        MAX_MAG_DELTA);
+
+                               /* Detect phase outlier */
+                               ar9003_hw_detect_outlier(coeff->phs_coeff[i],
+                                                        nmeasurement,
+                                                        MAX_PHS_DELTA);
+                       }
                }
 
                for (im = 0; im < nmeasurement; im++) {
+                       magnitude = coeff->mag_coeff[i][im][0];
+                       phase = coeff->phs_coeff[i][im][0];
 
-                       coeff->iqc_coeff[0] = (coeff->mag_coeff[i][im] & 0x7f) |
-                               ((coeff->phs_coeff[i][im] & 0x7f) << 7);
+                       coeff->iqc_coeff[0] =
+                               (phase & 0x7f) | ((magnitude & 0x7f) << 7);
 
                        if ((im % 2) == 0)
                                REG_RMW_FIELD(ah, tx_corr_coeff[im][i],
@@ -991,7 +1003,63 @@ static bool ar9003_hw_tx_iq_cal_run(stru
        return true;
 }
 
-static void ar9003_hw_tx_iq_cal_post_proc(struct ath_hw *ah, bool is_reusable)
+static void __ar955x_tx_iq_cal_sort(struct ath_hw *ah,
+                                   struct coeff *coeff,
+                                   int i, int nmeasurement)
+{
+       struct ath_common *common = ath9k_hw_common(ah);
+       int im, ix, iy, temp;
+
+       for (im = 0; im < nmeasurement; im++) {
+               for (ix = 0; ix < MAXIQCAL - 1; ix++) {
+                       for (iy = ix + 1; iy <= MAXIQCAL - 1; iy++) {
+                               if (coeff->mag_coeff[i][im][iy] <
+                                   coeff->mag_coeff[i][im][ix]) {
+                                       temp = coeff->mag_coeff[i][im][ix];
+                                       coeff->mag_coeff[i][im][ix] =
+                                               coeff->mag_coeff[i][im][iy];
+                                       coeff->mag_coeff[i][im][iy] = temp;
+                               }
+                               if (coeff->phs_coeff[i][im][iy] <
+                                   coeff->phs_coeff[i][im][ix]) {
+                                       temp = coeff->phs_coeff[i][im][ix];
+                                       coeff->phs_coeff[i][im][ix] =
+                                               coeff->phs_coeff[i][im][iy];
+                                       coeff->phs_coeff[i][im][iy] = temp;
+                               }
+                       }
+               }
+               coeff->mag_coeff[i][im][0] = coeff->mag_coeff[i][im][MAXIQCAL / 2];
+               coeff->phs_coeff[i][im][0] = coeff->phs_coeff[i][im][MAXIQCAL / 2];
+
+               ath_dbg(common, CALIBRATE,
+                       "IQCAL: Median [ch%d][gain%d]: mag = %d phase = %d\n",
+                       i, im,
+                       coeff->mag_coeff[i][im][0],
+                       coeff->phs_coeff[i][im][0]);
+       }
+}
+
+static bool ar955x_tx_iq_cal_median(struct ath_hw *ah,
+                                   struct coeff *coeff,
+                                   int iqcal_idx,
+                                   int nmeasurement)
+{
+       int i;
+
+       if ((iqcal_idx + 1) != MAXIQCAL)
+               return false;
+
+       for (i = 0; i < AR9300_MAX_CHAINS; i++) {
+               __ar955x_tx_iq_cal_sort(ah, coeff, i, nmeasurement);
+       }
+
+       return true;
+}
+
+static void ar9003_hw_tx_iq_cal_post_proc(struct ath_hw *ah,
+                                         int iqcal_idx,
+                                         bool is_reusable)
 {
        struct ath_common *common = ath9k_hw_common(ah);
        const u32 txiqcal_status[AR9300_MAX_CHAINS] = {
@@ -1004,10 +1072,11 @@ static void ar9003_hw_tx_iq_cal_post_pro
                AR_PHY_CHAN_INFO_TAB_1,
                AR_PHY_CHAN_INFO_TAB_2,
        };
-       struct coeff coeff;
+       static struct coeff coeff;
        s32 iq_res[6];
        int i, im, j;
-       int nmeasurement;
+       int nmeasurement = 0;
+       bool outlier_detect = true;
 
        for (i = 0; i < AR9300_MAX_CHAINS; i++) {
                if (!(ah->txchainmask & (1 << i)))
@@ -1065,17 +1134,23 @@ static void ar9003_hw_tx_iq_cal_post_pro
                                goto tx_iqcal_fail;
                        }
 
-                       coeff.mag_coeff[i][im] = coeff.iqc_coeff[0] & 0x7f;
-                       coeff.phs_coeff[i][im] =
+                       coeff.phs_coeff[i][im][iqcal_idx] =
+                               coeff.iqc_coeff[0] & 0x7f;
+                       coeff.mag_coeff[i][im][iqcal_idx] =
                                (coeff.iqc_coeff[0] >> 7) & 0x7f;
 
-                       if (coeff.mag_coeff[i][im] > 63)
-                               coeff.mag_coeff[i][im] -= 128;
-                       if (coeff.phs_coeff[i][im] > 63)
-                               coeff.phs_coeff[i][im] -= 128;
+                       if (coeff.mag_coeff[i][im][iqcal_idx] > 63)
+                               coeff.mag_coeff[i][im][iqcal_idx] -= 128;
+                       if (coeff.phs_coeff[i][im][iqcal_idx] > 63)
+                               coeff.phs_coeff[i][im][iqcal_idx] -= 128;
                }
        }
-       ar9003_hw_tx_iqcal_load_avg_2_passes(ah, &coeff, is_reusable);
+
+       if (AR_SREV_9550(ah))
+               outlier_detect = ar955x_tx_iq_cal_median(ah, &coeff,
+                                                        iqcal_idx, nmeasurement);
+       if (outlier_detect)
+               ar9003_hw_tx_iq_cal_outlier_detection(ah, &coeff, is_reusable);
 
        return;
 
@@ -1409,7 +1484,7 @@ skip_tx_iqcal:
        }
 
        if (txiqcal_done)
-               ar9003_hw_tx_iq_cal_post_proc(ah, is_reusable);
+               ar9003_hw_tx_iq_cal_post_proc(ah, 0, is_reusable);
        else if (caldata && test_bit(TXIQCAL_DONE, &caldata->cal_flags))
                ar9003_hw_tx_iq_cal_reload(ah);
 
@@ -1455,14 +1530,38 @@ skip_tx_iqcal:
        return true;
 }
 
+static bool do_ar9003_agc_cal(struct ath_hw *ah)
+{
+       struct ath_common *common = ath9k_hw_common(ah);
+       bool status;
+
+       REG_WRITE(ah, AR_PHY_AGC_CONTROL,
+                 REG_READ(ah, AR_PHY_AGC_CONTROL) |
+                 AR_PHY_AGC_CONTROL_CAL);
+
+       status = ath9k_hw_wait(ah, AR_PHY_AGC_CONTROL,
+                              AR_PHY_AGC_CONTROL_CAL,
+                              0, AH_WAIT_TIMEOUT);
+       if (!status) {
+               ath_dbg(common, CALIBRATE,
+                       "offset calibration failed to complete in %d ms,"
+                       "noisy environment?\n",
+                       AH_WAIT_TIMEOUT / 1000);
+               return false;
+       }
+
+       return true;
+}
+
 static bool ar9003_hw_init_cal_soc(struct ath_hw *ah,
                                   struct ath9k_channel *chan)
 {
        struct ath_common *common = ath9k_hw_common(ah);
        struct ath9k_hw_cal_data *caldata = ah->caldata;
        bool txiqcal_done = false;
-       bool is_reusable = true, status = true;
+       bool status = true;
        bool run_agc_cal = false, sep_iq_cal = false;
+       int i = 0;
 
        /* Use chip chainmask only for calibration */
        ar9003_hw_set_chain_masks(ah, ah->caps.rx_chainmask, ah->caps.tx_chainmask);
@@ -1485,7 +1584,12 @@ static bool ar9003_hw_init_cal_soc(struc
         * AGC calibration. Specifically, AR9550 in SoC chips.
         */
        if (ah->enabled_cals & TX_IQ_ON_AGC_CAL) {
-               txiqcal_done = true;
+               if (REG_READ_FIELD(ah, AR_PHY_TX_IQCAL_CONTROL_0,
+                                  AR_PHY_TX_IQCAL_CONTROL_0_ENABLE_TXIQ_CAL)) {
+                               txiqcal_done = true;
+               } else {
+                       txiqcal_done = false;
+               }
                run_agc_cal = true;
        } else {
                sep_iq_cal = true;
@@ -1512,27 +1616,37 @@ skip_tx_iqcal:
                if (AR_SREV_9330_11(ah))
                        ar9003_hw_manual_peak_cal(ah, 0, IS_CHAN_2GHZ(chan));
 
-               /* Calibrate the AGC */
-               REG_WRITE(ah, AR_PHY_AGC_CONTROL,
-                         REG_READ(ah, AR_PHY_AGC_CONTROL) |
-                         AR_PHY_AGC_CONTROL_CAL);
-
-               /* Poll for offset calibration complete */
-               status = ath9k_hw_wait(ah, AR_PHY_AGC_CONTROL,
-                                      AR_PHY_AGC_CONTROL_CAL,
-                                      0, AH_WAIT_TIMEOUT);
-       }
+               /*
+                * For non-AR9550 chips, we just trigger AGC calibration
+                * in the HW, poll for completion and then process
+                * the results.
+                *
+                * For AR955x, we run it multiple times and use
+                * median IQ correction.
+                */
+               if (!AR_SREV_9550(ah)) {
+                       status = do_ar9003_agc_cal(ah);
+                       if (!status)
+                               return false;
 
-       if (!status) {
-               ath_dbg(common, CALIBRATE,
-                       "offset calibration failed to complete in %d ms; noisy environment?\n",
-                       AH_WAIT_TIMEOUT / 1000);
-               return false;
+                       if (txiqcal_done)
+                               ar9003_hw_tx_iq_cal_post_proc(ah, 0, false);
+               } else {
+                       if (!txiqcal_done) {
+                               status = do_ar9003_agc_cal(ah);
+                               if (!status)
+                                       return false;
+                       } else {
+                               for (i = 0; i < MAXIQCAL; i++) {
+                                       status = do_ar9003_agc_cal(ah);
+                                       if (!status)
+                                               return false;
+                                       ar9003_hw_tx_iq_cal_post_proc(ah, i, false);
+                               }
+                       }
+               }
        }
 
-       if (txiqcal_done)
-               ar9003_hw_tx_iq_cal_post_proc(ah, is_reusable);
-
        /* Revert chainmask to runtime parameters */
        ar9003_hw_set_chain_masks(ah, ah->rxchainmask, ah->txchainmask);
 
--- a/drivers/net/wireless/rtl818x/rtl8187/rtl8187.h
+++ b/drivers/net/wireless/rtl818x/rtl8187/rtl8187.h
@@ -15,6 +15,8 @@
 #ifndef RTL8187_H
 #define RTL8187_H
 
+#include <linux/cache.h>
+
 #include "rtl818x.h"
 #include "leds.h"
 
@@ -139,7 +141,10 @@ struct rtl8187_priv {
        u8 aifsn[4];
        u8 rfkill_mask;
        struct {
-               __le64 buf;
+               union {
+                       __le64 buf;
+                       u8 dummy1[L1_CACHE_BYTES];
+               } ____cacheline_aligned;
                struct sk_buff_head queue;
        } b_tx_status; /* This queue is used by both -b and non-b devices */
        struct mutex io_mutex;
@@ -147,7 +152,8 @@ struct rtl8187_priv {
                u8 bits8;
                __le16 bits16;
                __le32 bits32;
-       } *io_dmabuf;
+               u8 dummy2[L1_CACHE_BYTES];
+       } *io_dmabuf ____cacheline_aligned;
        bool rfkill_off;
        u16 seqno;
 };
--- a/net/mac80211/wme.c
+++ b/net/mac80211/wme.c
@@ -154,6 +154,11 @@ u16 ieee80211_select_queue(struct ieee80
                return IEEE80211_AC_BE;
        }
 
+       if (skb->protocol == sdata->control_port_protocol) {
+               skb->priority = 7;
+               return ieee80211_downgrade_queue(sdata, skb);
+       }
+
        /* use the data classifier to determine what 802.1d tag the
         * data frame has */
        rcu_read_lock();
--- a/drivers/net/wireless/ath/ath9k/xmit.c
+++ b/drivers/net/wireless/ath/ath9k/xmit.c
@@ -1444,14 +1444,16 @@ void ath_tx_aggr_sleep(struct ieee80211_
        for (tidno = 0, tid = &an->tid[tidno];
             tidno < IEEE80211_NUM_TIDS; tidno++, tid++) {
 
-               if (!tid->sched)
-                       continue;
-
                ac = tid->ac;
                txq = ac->txq;
 
                ath_txq_lock(sc, txq);
 
+               if (!tid->sched) {
+                       ath_txq_unlock(sc, txq);
+                       continue;
+               }
+
                buffered = ath_tid_has_buffered(tid);
 
                tid->sched = false;
@@ -2184,14 +2186,15 @@ int ath_tx_start(struct ieee80211_hw *hw
                txq->stopped = true;
        }
 
+       if (txctl->an)
+               tid = ath_get_skb_tid(sc, txctl->an, skb);
+
        if (info->flags & IEEE80211_TX_CTL_PS_RESPONSE) {
                ath_txq_unlock(sc, txq);
                txq = sc->tx.uapsdq;
                ath_txq_lock(sc, txq);
        } else if (txctl->an &&
                   ieee80211_is_data_present(hdr->frame_control)) {
-               tid = ath_get_skb_tid(sc, txctl->an, skb);
-
                WARN_ON(tid->ac->txq != txctl->txq);
 
                if (info->flags & IEEE80211_TX_CTL_CLEAR_PS_FILT)
--- a/drivers/net/wireless/ath/ath9k/init.c
+++ b/drivers/net/wireless/ath/ath9k/init.c
@@ -943,6 +943,7 @@ static void ath9k_set_hw_capab(struct at
        hw->wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
        hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_5_10_MHZ;
        hw->wiphy->flags |= WIPHY_FLAG_HAS_CHANNEL_SWITCH;
+       hw->wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
 
        hw->queues = 4;
        hw->max_rates = 4;
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -1700,14 +1700,8 @@ void ieee80211_stop_queue_by_reason(stru
 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue);
 void ieee80211_add_pending_skb(struct ieee80211_local *local,
                               struct sk_buff *skb);
-void ieee80211_add_pending_skbs_fn(struct ieee80211_local *local,
-                                  struct sk_buff_head *skbs,
-                                  void (*fn)(void *data), void *data);
-static inline void ieee80211_add_pending_skbs(struct ieee80211_local *local,
-                                             struct sk_buff_head *skbs)
-{
-       ieee80211_add_pending_skbs_fn(local, skbs, NULL, NULL);
-}
+void ieee80211_add_pending_skbs(struct ieee80211_local *local,
+                               struct sk_buff_head *skbs);
 void ieee80211_flush_queues(struct ieee80211_local *local,
                            struct ieee80211_sub_if_data *sdata);
 
--- a/net/mac80211/sta_info.c
+++ b/net/mac80211/sta_info.c
@@ -91,7 +91,7 @@ static int sta_info_hash_del(struct ieee
        return -ENOENT;
 }
 
-static void cleanup_single_sta(struct sta_info *sta)
+static void __cleanup_single_sta(struct sta_info *sta)
 {
        int ac, i;
        struct tid_ampdu_tx *tid_tx;
@@ -99,7 +99,8 @@ static void cleanup_single_sta(struct st
        struct ieee80211_local *local = sdata->local;
        struct ps_data *ps;
 
-       if (test_sta_flag(sta, WLAN_STA_PS_STA)) {
+       if (test_sta_flag(sta, WLAN_STA_PS_STA) ||
+           test_sta_flag(sta, WLAN_STA_PS_DRIVER)) {
                if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
                    sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
                        ps = &sdata->bss->ps;
@@ -109,6 +110,7 @@ static void cleanup_single_sta(struct st
                        return;
 
                clear_sta_flag(sta, WLAN_STA_PS_STA);
+               clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
 
                atomic_dec(&ps->num_sta_ps);
                sta_info_recalc_tim(sta);
@@ -139,7 +141,14 @@ static void cleanup_single_sta(struct st
                ieee80211_purge_tx_queue(&local->hw, &tid_tx->pending);
                kfree(tid_tx);
        }
+}
 
+static void cleanup_single_sta(struct sta_info *sta)
+{
+       struct ieee80211_sub_if_data *sdata = sta->sdata;
+       struct ieee80211_local *local = sdata->local;
+
+       __cleanup_single_sta(sta);
        sta_info_free(local, sta);
 }
 
@@ -330,6 +339,7 @@ struct sta_info *sta_info_alloc(struct i
        rcu_read_unlock();
 
        spin_lock_init(&sta->lock);
+       spin_lock_init(&sta->ps_lock);
        INIT_WORK(&sta->drv_unblock_wk, sta_unblock);
        INIT_WORK(&sta->ampdu_mlme.work, ieee80211_ba_session_work);
        mutex_init(&sta->ampdu_mlme.mtx);
@@ -487,21 +497,26 @@ static int sta_info_insert_finish(struct
                goto out_err;
        }
 
-       /* notify driver */
-       err = sta_info_insert_drv_state(local, sdata, sta);
-       if (err)
-               goto out_err;
-
        local->num_sta++;
        local->sta_generation++;
        smp_mb();
 
+       /* simplify things and don't accept BA sessions yet */
+       set_sta_flag(sta, WLAN_STA_BLOCK_BA);
+
        /* make the station visible */
        sta_info_hash_add(local, sta);
 
        list_add_rcu(&sta->list, &local->sta_list);
 
+       /* notify driver */
+       err = sta_info_insert_drv_state(local, sdata, sta);
+       if (err)
+               goto out_remove;
+
        set_sta_flag(sta, WLAN_STA_INSERTED);
+       /* accept BA sessions now */
+       clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
 
        ieee80211_recalc_min_chandef(sdata);
        ieee80211_sta_debugfs_add(sta);
@@ -522,6 +537,12 @@ static int sta_info_insert_finish(struct
                mesh_accept_plinks_update(sdata);
 
        return 0;
+ out_remove:
+       sta_info_hash_del(local, sta);
+       list_del_rcu(&sta->list);
+       local->num_sta--;
+       synchronize_net();
+       __cleanup_single_sta(sta);
  out_err:
        mutex_unlock(&local->sta_mtx);
        rcu_read_lock();
@@ -1071,10 +1092,14 @@ struct ieee80211_sta *ieee80211_find_sta
 }
 EXPORT_SYMBOL(ieee80211_find_sta);
 
-static void clear_sta_ps_flags(void *_sta)
+/* powersave support code */
+void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta)
 {
-       struct sta_info *sta = _sta;
        struct ieee80211_sub_if_data *sdata = sta->sdata;
+       struct ieee80211_local *local = sdata->local;
+       struct sk_buff_head pending;
+       int filtered = 0, buffered = 0, ac;
+       unsigned long flags;
        struct ps_data *ps;
 
        if (sdata->vif.type == NL80211_IFTYPE_AP ||
@@ -1085,20 +1110,6 @@ static void clear_sta_ps_flags(void *_st
        else
                return;
 
-       clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
-       if (test_and_clear_sta_flag(sta, WLAN_STA_PS_STA))
-               atomic_dec(&ps->num_sta_ps);
-}
-
-/* powersave support code */
-void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta)
-{
-       struct ieee80211_sub_if_data *sdata = sta->sdata;
-       struct ieee80211_local *local = sdata->local;
-       struct sk_buff_head pending;
-       int filtered = 0, buffered = 0, ac;
-       unsigned long flags;
-
        clear_sta_flag(sta, WLAN_STA_SP);
 
        BUILD_BUG_ON(BITS_TO_LONGS(IEEE80211_NUM_TIDS) > 1);
@@ -1109,6 +1120,8 @@ void ieee80211_sta_ps_deliver_wakeup(str
 
        skb_queue_head_init(&pending);
 
+       /* sync with ieee80211_tx_h_unicast_ps_buf */
+       spin_lock(&sta->ps_lock);
        /* Send all buffered frames to the station */
        for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
                int count = skb_queue_len(&pending), tmp;
@@ -1127,7 +1140,12 @@ void ieee80211_sta_ps_deliver_wakeup(str
                buffered += tmp - count;
        }
 
-       ieee80211_add_pending_skbs_fn(local, &pending, clear_sta_ps_flags, sta);
+       ieee80211_add_pending_skbs(local, &pending);
+       clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
+       clear_sta_flag(sta, WLAN_STA_PS_STA);
+       spin_unlock(&sta->ps_lock);
+
+       atomic_dec(&ps->num_sta_ps);
 
        /* This station just woke up and isn't aware of our SMPS state */
        if (!ieee80211_smps_is_restrictive(sta->known_smps_mode,
--- a/net/mac80211/sta_info.h
+++ b/net/mac80211/sta_info.h
@@ -267,6 +267,7 @@ struct ieee80211_tx_latency_stat {
  * @drv_unblock_wk: used for driver PS unblocking
  * @listen_interval: listen interval of this station, when we're acting as AP
  * @_flags: STA flags, see &enum ieee80211_sta_info_flags, do not use directly
+ * @ps_lock: used for powersave (when mac80211 is the AP) related locking
  * @ps_tx_buf: buffers (per AC) of frames to transmit to this station
  *     when it leaves power saving state or polls
  * @tx_filtered: buffers (per AC) of frames we already tried to
@@ -356,10 +357,8 @@ struct sta_info {
        /* use the accessors defined below */
        unsigned long _flags;
 
-       /*
-        * STA powersave frame queues, no more than the internal
-        * locking required.
-        */
+       /* STA powersave lock and frame queues */
+       spinlock_t ps_lock;
        struct sk_buff_head ps_tx_buf[IEEE80211_NUM_ACS];
        struct sk_buff_head tx_filtered[IEEE80211_NUM_ACS];
        unsigned long driver_buffered_tids;
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -435,9 +435,8 @@ void ieee80211_add_pending_skb(struct ie
        spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 }
 
-void ieee80211_add_pending_skbs_fn(struct ieee80211_local *local,
-                                  struct sk_buff_head *skbs,
-                                  void (*fn)(void *data), void *data)
+void ieee80211_add_pending_skbs(struct ieee80211_local *local,
+                               struct sk_buff_head *skbs)
 {
        struct ieee80211_hw *hw = &local->hw;
        struct sk_buff *skb;
@@ -461,9 +460,6 @@ void ieee80211_add_pending_skbs_fn(struc
                __skb_queue_tail(&local->pending[queue], skb);
        }
 
-       if (fn)
-               fn(data);
-
        for (i = 0; i < hw->queues; i++)
                __ieee80211_wake_queue(hw, i,
                        IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
--- a/net/wireless/reg.c
+++ b/net/wireless/reg.c
@@ -1700,7 +1700,7 @@ static void reg_process_hint(struct regu
                return;
        case NL80211_REGDOM_SET_BY_USER:
                treatment = reg_process_hint_user(reg_request);
-               if (treatment == REG_REQ_OK ||
+               if (treatment == REG_REQ_IGNORE ||
                    treatment == REG_REQ_ALREADY_SET)
                        return;
                schedule_delayed_work(&reg_timeout, msecs_to_jiffies(3142));
--- a/drivers/net/wireless/ath/ath9k/debug.c
+++ b/drivers/net/wireless/ath/ath9k/debug.c
@@ -866,6 +866,12 @@ static ssize_t read_file_reset(struct fi
                         "%17s: %2d\n", "PLL RX Hang",
                         sc->debug.stats.reset[RESET_TYPE_PLL_HANG]);
        len += scnprintf(buf + len, sizeof(buf) - len,
+                        "%17s: %2d\n", "MAC Hang",
+                        sc->debug.stats.reset[RESET_TYPE_MAC_HANG]);
+       len += scnprintf(buf + len, sizeof(buf) - len,
+                        "%17s: %2d\n", "Stuck Beacon",
+                        sc->debug.stats.reset[RESET_TYPE_BEACON_STUCK]);
+       len += scnprintf(buf + len, sizeof(buf) - len,
                         "%17s: %2d\n", "MCI Reset",
                         sc->debug.stats.reset[RESET_TYPE_MCI]);
 
--- a/drivers/net/wireless/ath/ath9k/ar9003_phy.c
+++ b/drivers/net/wireless/ath/ath9k/ar9003_phy.c
@@ -868,10 +868,6 @@ static void ar9003_hw_set_rfmode(struct 
 
        if (IS_CHAN_A_FAST_CLOCK(ah, chan))
                rfMode |= (AR_PHY_MODE_DYNAMIC | AR_PHY_MODE_DYN_CCK_DISABLE);
-       if (IS_CHAN_QUARTER_RATE(chan))
-               rfMode |= AR_PHY_MODE_QUARTER;
-       if (IS_CHAN_HALF_RATE(chan))
-               rfMode |= AR_PHY_MODE_HALF;
 
        if (rfMode & (AR_PHY_MODE_QUARTER | AR_PHY_MODE_HALF))
                REG_RMW_FIELD(ah, AR_PHY_FRAME_CTL,
--- a/drivers/net/wireless/ath/ath5k/mac80211-ops.c
+++ b/drivers/net/wireless/ath/ath5k/mac80211-ops.c
@@ -706,6 +706,7 @@ ath5k_get_survey(struct ieee80211_hw *hw
        survey->channel = conf->chandef.chan;
        survey->noise = ah->ah_noise_floor;
        survey->filled = SURVEY_INFO_NOISE_DBM |
+                       SURVEY_INFO_IN_USE |
                        SURVEY_INFO_CHANNEL_TIME |
                        SURVEY_INFO_CHANNEL_TIME_BUSY |
                        SURVEY_INFO_CHANNEL_TIME_RX |
--- a/drivers/net/wireless/ath/ath9k/recv.c
+++ b/drivers/net/wireless/ath/ath9k/recv.c
@@ -732,11 +732,18 @@ static struct ath_rxbuf *ath_get_next_rx
                        return NULL;
 
                /*
-                * mark descriptor as zero-length and set the 'more'
-                * flag to ensure that both buffers get discarded
+                * Re-check previous descriptor, in case it has been filled
+                * in the mean time.
                 */
-               rs->rs_datalen = 0;
-               rs->rs_more = true;
+               ret = ath9k_hw_rxprocdesc(ah, ds, rs);
+               if (ret == -EINPROGRESS) {
+                       /*
+                        * mark descriptor as zero-length and set the 'more'
+                        * flag to ensure that both buffers get discarded
+                        */
+                       rs->rs_datalen = 0;
+                       rs->rs_more = true;
+               }
        }
 
        list_del(&bf->list);
@@ -985,32 +992,32 @@ static int ath9k_rx_skb_preprocess(struc
        struct ath_common *common = ath9k_hw_common(ah);
        struct ieee80211_hdr *hdr;
        bool discard_current = sc->rx.discard_next;
-       int ret = 0;
 
        /*
         * Discard corrupt descriptors which are marked in
         * ath_get_next_rx_buf().
         */
-       sc->rx.discard_next = rx_stats->rs_more;
        if (discard_current)
-               return -EINVAL;
+               goto corrupt;
+
+       sc->rx.discard_next = false;
 
        /*
         * Discard zero-length packets.
         */
        if (!rx_stats->rs_datalen) {
                RX_STAT_INC(rx_len_err);
-               return -EINVAL;
+               goto corrupt;
        }
 
-        /*
-         * rs_status follows rs_datalen so if rs_datalen is too large
-         * we can take a hint that hardware corrupted it, so ignore
-         * those frames.
-         */
+       /*
+        * rs_status follows rs_datalen so if rs_datalen is too large
+        * we can take a hint that hardware corrupted it, so ignore
+        * those frames.
+        */
        if (rx_stats->rs_datalen > (common->rx_bufsize - ah->caps.rx_status_len)) {
                RX_STAT_INC(rx_len_err);
-               return -EINVAL;
+               goto corrupt;
        }
 
        /* Only use status info from the last fragment */
@@ -1024,10 +1031,8 @@ static int ath9k_rx_skb_preprocess(struc
         * This is different from the other corrupt descriptor
         * condition handled above.
         */
-       if (rx_stats->rs_status & ATH9K_RXERR_CORRUPT_DESC) {
-               ret = -EINVAL;
-               goto exit;
-       }
+       if (rx_stats->rs_status & ATH9K_RXERR_CORRUPT_DESC)
+               goto corrupt;
 
        hdr = (struct ieee80211_hdr *) (skb->data + ah->caps.rx_status_len);
 
@@ -1043,18 +1048,15 @@ static int ath9k_rx_skb_preprocess(struc
                if (ath_process_fft(sc, hdr, rx_stats, rx_status->mactime))
                        RX_STAT_INC(rx_spectral);
 
-               ret = -EINVAL;
-               goto exit;
+               return -EINVAL;
        }
 
        /*
         * everything but the rate is checked here, the rate check is done
         * separately to avoid doing two lookups for a rate for each frame.
         */
-       if (!ath9k_rx_accept(common, hdr, rx_status, rx_stats, decrypt_error)) {
-               ret = -EINVAL;
-               goto exit;
-       }
+       if (!ath9k_rx_accept(common, hdr, rx_status, rx_stats, decrypt_error))
+               return -EINVAL;
 
        if (ath_is_mybeacon(common, hdr)) {
                RX_STAT_INC(rx_beacons);
@@ -1064,15 +1066,11 @@ static int ath9k_rx_skb_preprocess(struc
        /*
         * This shouldn't happen, but have a safety check anyway.
         */
-       if (WARN_ON(!ah->curchan)) {
-               ret = -EINVAL;
-               goto exit;
-       }
+       if (WARN_ON(!ah->curchan))
+               return -EINVAL;
 
-       if (ath9k_process_rate(common, hw, rx_stats, rx_status)) {
-               ret =-EINVAL;
-               goto exit;
-       }
+       if (ath9k_process_rate(common, hw, rx_stats, rx_status))
+               return -EINVAL;
 
        ath9k_process_rssi(common, hw, rx_stats, rx_status);
 
@@ -1087,9 +1085,11 @@ static int ath9k_rx_skb_preprocess(struc
                sc->rx.num_pkts++;
 #endif
 
-exit:
-       sc->rx.discard_next = false;
-       return ret;
+       return 0;
+
+corrupt:
+       sc->rx.discard_next = rx_stats->rs_more;
+       return -EINVAL;
 }
 
 static void ath9k_rx_skb_postprocess(struct ath_common *common,
--- a/drivers/net/wireless/ath/ath9k/ani.c
+++ b/drivers/net/wireless/ath/ath9k/ani.c
@@ -176,16 +176,26 @@ static void ath9k_hw_set_ofdm_nil(struct
        if (ah->opmode == NL80211_IFTYPE_STATION &&
            BEACON_RSSI(ah) <= ATH9K_ANI_RSSI_THR_HIGH)
                weak_sig = true;
-
        /*
-        * OFDM Weak signal detection is always enabled for AP mode.
+        * Newer chipsets are better at dealing with high PHY error counts -
+        * keep weak signal detection enabled when no RSSI threshold is
+        * available to determine if it is needed (mode != STA)
         */
-       if (ah->opmode != NL80211_IFTYPE_AP &&
-           aniState->ofdmWeakSigDetect != weak_sig) {
-               ath9k_hw_ani_control(ah,
-                                    ATH9K_ANI_OFDM_WEAK_SIGNAL_DETECTION,
-                                    entry_ofdm->ofdm_weak_signal_on);
-       }
+       else if (AR_SREV_9300_20_OR_LATER(ah) &&
+                ah->opmode != NL80211_IFTYPE_STATION)
+               weak_sig = true;
+
+       /* Older chipsets are more sensitive to high PHY error counts */
+       else if (!AR_SREV_9300_20_OR_LATER(ah) &&
+                aniState->ofdmNoiseImmunityLevel >= 8)
+               weak_sig = false;
+
+       if (aniState->ofdmWeakSigDetect != weak_sig)
+               ath9k_hw_ani_control(ah, ATH9K_ANI_OFDM_WEAK_SIGNAL_DETECTION,
+                                    weak_sig);
+
+       if (!AR_SREV_9300_20_OR_LATER(ah))
+               return;
 
        if (aniState->ofdmNoiseImmunityLevel >= ATH9K_ANI_OFDM_DEF_LEVEL) {
                ah->config.ofdm_trig_high = ATH9K_ANI_OFDM_TRIG_HIGH;
@@ -483,10 +493,17 @@ void ath9k_hw_ani_init(struct ath_hw *ah
 
        ath_dbg(common, ANI, "Initialize ANI\n");
 
-       ah->config.ofdm_trig_high = ATH9K_ANI_OFDM_TRIG_HIGH;
-       ah->config.ofdm_trig_low = ATH9K_ANI_OFDM_TRIG_LOW;
-       ah->config.cck_trig_high = ATH9K_ANI_CCK_TRIG_HIGH;
-       ah->config.cck_trig_low = ATH9K_ANI_CCK_TRIG_LOW;
+       if (AR_SREV_9300_20_OR_LATER(ah)) {
+               ah->config.ofdm_trig_high = ATH9K_ANI_OFDM_TRIG_HIGH;
+               ah->config.ofdm_trig_low = ATH9K_ANI_OFDM_TRIG_LOW;
+               ah->config.cck_trig_high = ATH9K_ANI_CCK_TRIG_HIGH;
+               ah->config.cck_trig_low = ATH9K_ANI_CCK_TRIG_LOW;
+       } else {
+               ah->config.ofdm_trig_high = ATH9K_ANI_OFDM_TRIG_HIGH_OLD;
+               ah->config.ofdm_trig_low = ATH9K_ANI_OFDM_TRIG_LOW_OLD;
+               ah->config.cck_trig_high = ATH9K_ANI_CCK_TRIG_HIGH_OLD;
+               ah->config.cck_trig_low = ATH9K_ANI_CCK_TRIG_LOW_OLD;
+       }
 
        ani->spurImmunityLevel = ATH9K_ANI_SPUR_IMMUNE_LVL;
        ani->firstepLevel = ATH9K_ANI_FIRSTEP_LVL;
--- a/drivers/net/wireless/ath/ath9k/ani.h
+++ b/drivers/net/wireless/ath/ath9k/ani.h
@@ -22,12 +22,16 @@
 /* units are errors per second */
 #define ATH9K_ANI_OFDM_TRIG_HIGH           3500
 #define ATH9K_ANI_OFDM_TRIG_HIGH_BELOW_INI 1000
+#define ATH9K_ANI_OFDM_TRIG_HIGH_OLD       500
 
 #define ATH9K_ANI_OFDM_TRIG_LOW           400
 #define ATH9K_ANI_OFDM_TRIG_LOW_ABOVE_INI 900
+#define ATH9K_ANI_OFDM_TRIG_LOW_OLD       200
 
 #define ATH9K_ANI_CCK_TRIG_HIGH           600
+#define ATH9K_ANI_CCK_TRIG_HIGH_OLD       200
 #define ATH9K_ANI_CCK_TRIG_LOW            300
+#define ATH9K_ANI_CCK_TRIG_LOW_OLD        100
 
 #define ATH9K_ANI_SPUR_IMMUNE_LVL         3
 #define ATH9K_ANI_FIRSTEP_LVL             2