package/kernel/mac80211/patches/312-ath9k-Fix-offchannel-flush-timeout.patch

   1 From: Sujith Manoharan <c_manoha@qca.qualcomm.com>
   2 Date: Fri, 17 Oct 2014 07:40:17 +0530
   3 Subject: [PATCH] ath9k: Fix offchannel flush timeout
   4
   5 An offchannel operation also needs to have
   6 a flush timeout that doesn't exceed the NoA
   7 absence duration of a GO context, so use
   8 channel_switch_time. The first offchannel
   9 operation is set a flush timeout of 10ms since
  10 channel_switch_time will be zero.
  11
  12 Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
  13 ---
  14
  15 --- a/drivers/net/wireless/ath/ath9k/channel.c
  16 +++ b/drivers/net/wireless/ath/ath9k/channel.c
  17 @@ -207,6 +207,26 @@ void ath_chanctx_check_active(struct ath
  18         if (!ctx)
  19                 return;
  20
  21 +       if (ctx == &sc->offchannel.chan) {
  22 +               spin_lock_bh(&sc->chan_lock);
  23 +
  24 +               if (likely(sc->sched.channel_switch_time))
  25 +                       ctx->flush_timeout =
  26 +                               usecs_to_jiffies(sc->sched.channel_switch_time);
  27 +               else
  28 +                       ctx->flush_timeout =
  29 +                               msecs_to_jiffies(10);
  30 +
  31 +               spin_unlock_bh(&sc->chan_lock);
  32 +
  33 +               /*
  34 +                * There is no need to iterate over the
  35 +                * active/assigned channel contexts if
  36 +                * the current context is offchannel.
  37 +                */
  38 +               return;
  39 +       }
  40 +
  41         ictx = ctx;
  42
  43         list_for_each_entry(avp, &ctx->vifs, list) {