mac80211: update to wireless-testing 2015-03-09

[openwrt/staging/yousong.git] / package / kernel / mac80211 / patches / 332-ath5k-fix-reset-race.patch

diff --git a/package/kernel/mac80211/patches/332-ath5k-fix-reset-race.patch b/package/kernel/mac80211/patches/332-ath5k-fix-reset-race.patch
deleted file mode 100644 (file)
index 4a3abaa..0000000
--- a/package/kernel/mac80211/patches/332-ath5k-fix-reset-race.patch
+++ /dev/null
@@ -1,104 +0,0 @@
-From d8d4050dff457b79ad7e9356103cad557c338532 Mon Sep 17 00:00:00 2001
-From: Sergey Ryazanov <ryazanov.s.a@gmail.com>
-Date: Wed, 4 Mar 2015 03:16:34 +0300
-Subject: [PATCH] ath5k: fix reset race
-
-To prepare for reset ath5k should finish all asynchronous tasks. At
-first, it disables the interrupt generation, then it waits for the
-interrupt handler and tasklets completion, and then proceeds to the HW
-configuration update. But it does not consider that the interrupt
-handler or tasklet re-enables the interrupt generation. And we fall in a
-situation when ath5k assumes that interrupts are disabled, but it is
-not.
-
-This can lead to different consequences, such as reception of the frame,
-when we do not expect it. Under certain circumstances, this can lead to
-the following warning:
-
-  WARNING: at ath5k/base.c:589 ath5k_tasklet_rx+0x318/0x6ec [ath5k]()
-  invalid hw_rix: 1a
-  [..]
-  Call Trace:
-  [<802656a8>] show_stack+0x48/0x70
-  [<802dd92c>] warn_slowpath_common+0x88/0xbc
-  [<802dd98c>] warn_slowpath_fmt+0x2c/0x38
-  [<81b51be8>] ath5k_tasklet_rx+0x318/0x6ec [ath5k]
-  [<8028ac64>] tasklet_action+0x8c/0xf0
-  [<80075804>] __do_softirq+0x180/0x32c
-  [<80196ce8>] irq_exit+0x54/0x70
-  [<80041848>] ret_from_irq+0x0/0x4
-  [<80182fdc>] ioread32+0x4/0xc
-  [<81b4c42c>] ath5k_hw_set_sleep_clock+0x2ec/0x474 [ath5k]
-  [<81b4cf28>] ath5k_hw_reset+0x50/0xeb8 [ath5k]
-  [<81b50900>] ath5k_reset+0xd4/0x310 [ath5k]
-  [<81b557e8>] ath5k_config+0x4c/0x104 [ath5k]
-  [<80d01770>] ieee80211_hw_config+0x2f4/0x35c [mac80211]
-  [<80d09aa8>] ieee80211_scan_work+0x2e4/0x414 [mac80211]
-  [<8022c3f4>] process_one_work+0x28c/0x400
-  [<802df8f8>] worker_thread+0x258/0x3c0
-  [<801b5710>] kthread+0xe0/0xec
-  [<800418a8>] ret_from_kernel_thread+0x14/0x1c
-
-Fix this issue by adding a new status flag, which forbids to re-enable
-the interrupt generation until the HW configuration is completed.
-
-Note: previous patch, which reorders the Rx disable code helps to avoid
-the above warning, but not fixes the root cause of unexpected frame
-receiving.
-
-CC: Jiri Slaby <jirislaby@gmail.com>
-CC: Nick Kossifidis <mickflemm@gmail.com>
-CC: Luis R. Rodriguez <mcgrof@do-not-panic.com>
-Reported-by: Christophe Prevotaux <cprevotaux@nltinc.com>
-Tested-by: Christophe Prevotaux <cprevotaux@nltinc.com>
-Tested-by: Eric Bree <ebree@nltinc.com>
-Signed-off-by: Sergey Ryazanov <ryazanov.s.a@gmail.com>
----
- drivers/net/wireless/ath/ath5k/ath5k.h | 1 +
- drivers/net/wireless/ath/ath5k/base.c  | 7 +++++++
- 2 files changed, 8 insertions(+)
-
-diff --git a/drivers/net/wireless/ath/ath5k/ath5k.h b/drivers/net/wireless/ath/ath5k/ath5k.h
-index 1ed7a88..7ca0d6f 100644
---- a/drivers/net/wireless/ath/ath5k/ath5k.h
-+++ b/drivers/net/wireless/ath/ath5k/ath5k.h
-@@ -1283,6 +1283,7 @@ struct ath5k_hw {
- #define ATH_STAT_PROMISC      1
- #define ATH_STAT_LEDSOFT      2               /* enable LED gpio status */
- #define ATH_STAT_STARTED      3               /* opened & irqs enabled */
-+#define ATH_STAT_RESET                4               /* hw reset */
- 
-       unsigned int            filter_flags;   /* HW flags, AR5K_RX_FILTER_* */
-       unsigned int            fif_filter_flags; /* Current FIF_* filter flags */
-diff --git a/drivers/net/wireless/ath/ath5k/base.c b/drivers/net/wireless/ath/ath5k/base.c
-index 34b2f15..41848e1 100644
---- a/drivers/net/wireless/ath/ath5k/base.c
-+++ b/drivers/net/wireless/ath/ath5k/base.c
-@@ -1523,6 +1523,9 @@ ath5k_set_current_imask(struct ath5k_hw *ah)
-       enum ath5k_int imask;
-       unsigned long flags;
- 
-+      if (test_bit(ATH_STAT_RESET, ah->status))
-+              return;
-+
-       spin_lock_irqsave(&ah->irqlock, flags);
-       imask = ah->imask;
-       if (ah->rx_pending)
-@@ -2862,6 +2865,8 @@ ath5k_reset(struct ath5k_hw *ah, struct ieee80211_channel *chan,
- 
-       ATH5K_DBG(ah, ATH5K_DEBUG_RESET, "resetting\n");
- 
-+      __set_bit(ATH_STAT_RESET, ah->status);
-+
-       ath5k_hw_set_imr(ah, 0);
-       synchronize_irq(ah->irq);
-       ath5k_stop_tasklets(ah);
-@@ -2952,6 +2957,8 @@ ath5k_reset(struct ath5k_hw *ah, struct ieee80211_channel *chan,
-        */
- /*    ath5k_chan_change(ah, c); */
- 
-+      __clear_bit(ATH_STAT_RESET, ah->status);
-+
-       ath5k_beacon_config(ah);
-       /* intrs are enabled by ath5k_beacon_config */
-