ath9k: make sure that the rx path does not get stuck

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@20499 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/package/mac80211/patches/550-ath9k_bb_fix.patch b/package/mac80211/patches/550-ath9k_bb_fix.patch
new file mode 100644 (file)
index 0000000..17bee7c
--- /dev/null
+++ b/package/mac80211/patches/550-ath9k_bb_fix.patch
@@ -0,0 +1,59 @@
+--- a/drivers/net/wireless/ath/ath9k/hw.c
++++ b/drivers/net/wireless/ath/ath9k/hw.c
+@@ -1911,6 +1911,34 @@ static void ath9k_enable_rfkill(struct a
+       REG_SET_BIT(ah, AR_PHY_TEST, RFSILENT_BB);
+ }
+ 
++bool ath9k_hw_check_alive(struct ath_hw *ah)
++{
++      int count = 50;
++      u32 reg;
++
++      if (AR_SREV_9285_10_OR_LATER(ah))
++              return true;
++
++      do {
++              reg = REG_READ(ah, AR_OBS_BUS_1);
++
++              if ((reg & 0x7E7FFFEF) != 0x00702400)
++                      return true;
++
++              switch (reg & 0x7E000B00) {
++              case 0x1E000000:
++              case 0x52000B00:
++              case 0x18000B00:
++                      continue;
++              default:
++                      return true;
++              }
++      } while (count-- > 0);
++
++      return false;
++}
++EXPORT_SYMBOL(ath9k_hw_check_alive);
++
+ int ath9k_hw_reset(struct ath_hw *ah, struct ath9k_channel *chan,
+                   bool bChannelChange)
+ {
+--- a/drivers/net/wireless/ath/ath9k/hw.h
++++ b/drivers/net/wireless/ath/ath9k/hw.h
+@@ -679,6 +679,7 @@ void ath9k_hw_set11nmac2040(struct ath_h
+ void ath9k_hw_beaconinit(struct ath_hw *ah, u32 next_beacon, u32 beacon_period);
+ void ath9k_hw_set_sta_beacon_timers(struct ath_hw *ah,
+                                   const struct ath9k_beacon_state *bs);
++bool ath9k_hw_check_alive(struct ath_hw *ah);
+ 
+ bool ath9k_hw_setpower(struct ath_hw *ah, enum ath9k_power_mode mode);
+ 
+--- a/drivers/net/wireless/ath/ath9k/main.c
++++ b/drivers/net/wireless/ath/ath9k/main.c
+@@ -405,7 +405,8 @@ void ath9k_tasklet(unsigned long data)
+ 
+       ath9k_ps_wakeup(sc);
+ 
+-      if (status & ATH9K_INT_FATAL) {
++      if ((status & ATH9K_INT_FATAL) ||
++          !ath9k_hw_check_alive(ah)) {
+               ath_reset(sc, false);
+               ath9k_ps_restore(sc);
+               return;