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

1 files changed, 59 insertions, 0 deletions

diff --git a/package/mac80211/patches/550-ath9k_bb_fix.patch b/package/mac80211/patches/550-ath9k_bb_fix.patch
new file mode 100644
index 000000000..17bee7c2c
--- /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;