ath9k: reduce the number of false positives triggered by the baseband hang check...

SVN-Revision: 24954

diff --git a/package/mac80211/patches/540-ath9k_bb_hang_check_fix.patch b/package/mac80211/patches/540-ath9k_bb_hang_check_fix.patch
new file mode 100644 (file)
index 0000000..19c6abd
--- /dev/null
+++ b/package/mac80211/patches/540-ath9k_bb_hang_check_fix.patch
@@ -0,0 +1,30 @@
+
+--- a/drivers/net/wireless/ath/ath9k/main.c
++++ b/drivers/net/wireless/ath/ath9k/main.c
+@@ -251,6 +251,9 @@ int ath_set_channel(struct ath_softc *sc
+       if (!ath_stoprecv(sc))
+               stopped = false;
+ 
++      if (!ath9k_hw_check_alive(ah))
++              stopped = false;
++
+       /* XXX: do not flush receive queue here. We don't want
+        * to flush data frames already in queue because of
+        * changing channel. */
+@@ -602,7 +605,15 @@ void ath9k_tasklet(unsigned long data)
+ 
+       spin_lock(&sc->sc_pcu_lock);
+ 
+-      if (!ath9k_hw_check_alive(ah))
++      /*
++       * Only run the baseband hang check if beacons stop working in AP or
++       * IBSS mode, because it has a high false positive rate. For station
++       * mode it should not be necessary, since the upper layers will detect
++       * this through a beacon miss automatically and the following channel
++       * change will trigger a hardware reset anyway
++       */
++      if (ath9k_hw_numtxpending(ah, sc->beacon.beaconq) != 0 &&
++          !ath9k_hw_check_alive(ah))
+               ieee80211_queue_work(sc->hw, &sc->hw_check_work);
+ 
+       if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)