package/kernel/mac80211/patches/subsys/317-cfg80211-schedule-offchan_cac_abort_wk-in-cfg80211_r.patch

   1 From: Lorenzo Bianconi <lorenzo@kernel.org>
   2 Date: Tue, 16 Nov 2021 12:41:52 +0100
   3 Subject: [PATCH] cfg80211: schedule offchan_cac_abort_wk in
   4  cfg80211_radar_event
   5
   6 If necessary schedule offchan_cac_abort_wk work in cfg80211_radar_event
   7 routine adding offchan parameter to cfg80211_radar_event signature.
   8 Rename cfg80211_radar_event in __cfg80211_radar_event and introduce
   9 the two following inline helpers:
  10 - cfg80211_radar_event
  11 - cfg80211_offchan_radar_event
  12 Doing so the drv will not need to run cfg80211_offchan_cac_abort() after
  13 radar detection on the offchannel chain.
  14
  15 Tested-by: Owen Peng <owen.peng@mediatek.com>
  16 Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
  17 Link: https://lore.kernel.org/r/3ff583e021e3343a3ced54a7b09b5e184d1880dc.1637062727.git.lorenzo@kernel.org
  18 Signed-off-by: Johannes Berg <johannes.berg@intel.com>
  19 ---
  20
  21 --- a/include/net/cfg80211.h
  22 +++ b/include/net/cfg80211.h
  23 @@ -7580,15 +7580,33 @@ void cfg80211_cqm_txe_notify(struct net_
  24  void cfg80211_cqm_beacon_loss_notify(struct net_device *dev, gfp_t gfp);
  25
  26  /**
  27 - * cfg80211_radar_event - radar detection event
  28 + * __cfg80211_radar_event - radar detection event
  29   * @wiphy: the wiphy
  30   * @chandef: chandef for the current channel
  31 + * @offchan: the radar has been detected on the offchannel chain
  32   * @gfp: context flags
  33   *
  34   * This function is called when a radar is detected on the current chanenl.
  35   */
  36 -void cfg80211_radar_event(struct wiphy *wiphy,
  37 -                         struct cfg80211_chan_def *chandef, gfp_t gfp);
  38 +void __cfg80211_radar_event(struct wiphy *wiphy,
  39 +                           struct cfg80211_chan_def *chandef,
  40 +                           bool offchan, gfp_t gfp);
  41 +
  42 +static inline void
  43 +cfg80211_radar_event(struct wiphy *wiphy,
  44 +                    struct cfg80211_chan_def *chandef,
  45 +                    gfp_t gfp)
  46 +{
  47 +       __cfg80211_radar_event(wiphy, chandef, false, gfp);
  48 +}
  49 +
  50 +static inline void
  51 +cfg80211_offchan_radar_event(struct wiphy *wiphy,
  52 +                            struct cfg80211_chan_def *chandef,
  53 +                            gfp_t gfp)
  54 +{
  55 +       __cfg80211_radar_event(wiphy, chandef, true, gfp);
  56 +}
  57
  58  /**
  59   * cfg80211_sta_opmode_change_notify - STA's ht/vht operation mode change event
  60 --- a/net/wireless/mlme.c
  61 +++ b/net/wireless/mlme.c
  62 @@ -905,13 +905,13 @@ void cfg80211_dfs_channels_update_work(s
  63  }
  64
  65
  66 -void cfg80211_radar_event(struct wiphy *wiphy,
  67 -                         struct cfg80211_chan_def *chandef,
  68 -                         gfp_t gfp)
  69 +void __cfg80211_radar_event(struct wiphy *wiphy,
  70 +                           struct cfg80211_chan_def *chandef,
  71 +                           bool offchan, gfp_t gfp)
  72  {
  73         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
  74
  75 -       trace_cfg80211_radar_event(wiphy, chandef);
  76 +       trace_cfg80211_radar_event(wiphy, chandef, offchan);
  77
  78         /* only set the chandef supplied channel to unavailable, in
  79          * case the radar is detected on only one of multiple channels
  80 @@ -919,6 +919,9 @@ void cfg80211_radar_event(struct wiphy *
  81          */
  82         cfg80211_set_dfs_state(wiphy, chandef, NL80211_DFS_UNAVAILABLE);
  83
  84 +       if (offchan)
  85 +               queue_work(cfg80211_wq, &rdev->offchan_cac_abort_wk);
  86 +
  87         cfg80211_sched_dfs_chan_update(rdev);
  88
  89         nl80211_radar_notify(rdev, chandef, NL80211_RADAR_DETECTED, NULL, gfp);
  90 @@ -926,7 +929,7 @@ void cfg80211_radar_event(struct wiphy *
  91         memcpy(&rdev->radar_chandef, chandef, sizeof(struct cfg80211_chan_def));
  92         queue_work(cfg80211_wq, &rdev->propagate_radar_detect_wk);
  93  }
  94 -EXPORT_SYMBOL(cfg80211_radar_event);
  95 +EXPORT_SYMBOL(__cfg80211_radar_event);
  96
  97  void cfg80211_cac_event(struct net_device *netdev,
  98                         const struct cfg80211_chan_def *chandef,
  99 @@ -998,7 +1001,8 @@ __cfg80211_offchan_cac_event(struct cfg8
 100                 rdev->offchan_radar_wdev = NULL;
 101                 break;
 102         case NL80211_RADAR_CAC_ABORTED:
 103 -               cancel_delayed_work(&rdev->offchan_cac_done_wk);
 104 +               if (!cancel_delayed_work(&rdev->offchan_cac_done_wk))
 105 +                       return;
 106                 wdev = rdev->offchan_radar_wdev;
 107                 rdev->offchan_radar_wdev = NULL;
 108                 break;
 109 --- a/net/wireless/trace.h
 110 +++ b/net/wireless/trace.h
 111 @@ -3022,18 +3022,21 @@ TRACE_EVENT(cfg80211_ch_switch_started_n
 112  );
 113
 114  TRACE_EVENT(cfg80211_radar_event,
 115 -       TP_PROTO(struct wiphy *wiphy, struct cfg80211_chan_def *chandef),
 116 -       TP_ARGS(wiphy, chandef),
 117 +       TP_PROTO(struct wiphy *wiphy, struct cfg80211_chan_def *chandef,
 118 +                bool offchan),
 119 +       TP_ARGS(wiphy, chandef, offchan),
 120         TP_STRUCT__entry(
 121                 WIPHY_ENTRY
 122                 CHAN_DEF_ENTRY
 123 +               __field(bool, offchan)
 124         ),
 125         TP_fast_assign(
 126                 WIPHY_ASSIGN;
 127                 CHAN_DEF_ASSIGN(chandef);
 128 +               __entry->offchan = offchan;
 129         ),
 130 -       TP_printk(WIPHY_PR_FMT ", " CHAN_DEF_PR_FMT,
 131 -                 WIPHY_PR_ARG, CHAN_DEF_PR_ARG)
 132 +       TP_printk(WIPHY_PR_FMT ", " CHAN_DEF_PR_FMT ", offchan %d",
 133 +                 WIPHY_PR_ARG, CHAN_DEF_PR_ARG, __entry->offchan)
 134  );
 135
 136  TRACE_EVENT(cfg80211_cac_event,