ath9k: Fix offchannel flush timeout

An offchannel operation also needs to have
a flush timeout that doesn't exceed the NoA
absence duration of a GO context, so use
channel_switch_time. The first offchannel
operation is set a flush timeout of 10ms since
channel_switch_time will be zero.

Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/ath/ath9k/channel.c b/drivers/net/wireless/ath/ath9k/channel.c
index 7e518aa..abc3e2e 100644 (file)
--- a/drivers/net/wireless/ath/ath9k/channel.c
+++ b/drivers/net/wireless/ath/ath9k/channel.c
@@ -207,6 +207,26 @@ void ath_chanctx_check_active(struct ath_softc *sc, struct ath_chanctx *ctx)
        if (!ctx)
                return;
 
+       if (ctx == &sc->offchannel.chan) {
+               spin_lock_bh(&sc->chan_lock);
+
+               if (likely(sc->sched.channel_switch_time))
+                       ctx->flush_timeout =
+                               usecs_to_jiffies(sc->sched.channel_switch_time);
+               else
+                       ctx->flush_timeout =
+                               msecs_to_jiffies(10);
+
+               spin_unlock_bh(&sc->chan_lock);
+
+               /*
+                * There is no need to iterate over the
+                * active/assigned channel contexts if
+                * the current context is offchannel.
+                */
+               return;
+       }
+
        ictx = ctx;
 
        list_for_each_entry(avp, &ctx->vifs, list) {