ath9k: fix some ps wakeup/restore issues that led to crashes and other weird behavior

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@25058 3c298f89-4303-0410-b956-a3cf2f4a3e73

package/mac80211/patches/550-ath9k_fix_ps_wakeup_issues.patch

@@ -0,0 +1,61 @@
+--- a/drivers/net/wireless/ath/ath9k/xmit.c
++++ b/drivers/net/wireless/ath/ath9k/xmit.c
+@@ -2111,9 +2111,7 @@ static void ath_tx_complete_poll_work(st
+ 	if (needreset) {
+ 		ath_dbg(ath9k_hw_common(sc->sc_ah), ATH_DBG_RESET,
+ 			"tx hung, resetting the chip\n");
+-		ath9k_ps_wakeup(sc);
+ 		ath_reset(sc, true);
+-		ath9k_ps_restore(sc);
+ 	}
+ 
+ 	ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work,
+--- a/drivers/net/wireless/ath/ath9k/main.c
++++ b/drivers/net/wireless/ath/ath9k/main.c
+@@ -592,19 +592,16 @@ void ath9k_tasklet(unsigned long data)
+ 	struct ath_softc *sc = (struct ath_softc *)data;
+ 	struct ath_hw *ah = sc->sc_ah;
+ 	struct ath_common *common = ath9k_hw_common(ah);
+-
+ 	u32 status = sc->intrstatus;
+ 	u32 rxmask;
+ 
+-	ath9k_ps_wakeup(sc);
+-
+ 	if (status & ATH9K_INT_FATAL) {
+ 		ath_reset(sc, true);
+-		ath9k_ps_restore(sc);
+ 		return;
+ 	}
+ 
+ 	spin_lock(&sc->sc_pcu_lock);
++	ath9k_ps_wakeup(sc);
+ 
+ 	/*
+ 	 * Only run the baseband hang check if beacons stop working in AP or
+@@ -980,6 +977,7 @@ int ath_reset(struct ath_softc *sc, bool
+ 	/* Stop ANI */
+ 	del_timer_sync(&common->ani.timer);
+ 
++	ath9k_ps_wakeup(sc);
+ 	spin_lock_bh(&sc->sc_pcu_lock);
+ 
+ 	ieee80211_stop_queues(hw);
+@@ -1026,6 +1024,7 @@ int ath_reset(struct ath_softc *sc, bool
+ 
+ 	/* Start ANI */
+ 	ath_start_ani(common);
++	ath9k_ps_restore(sc);
+ 
+ 	return r;
+ }
+@@ -1748,7 +1747,9 @@ static int ath9k_config(struct ieee80211
+ 
+ 	if (changed & IEEE80211_CONF_CHANGE_POWER) {
+ 		sc->config.txpowlimit = 2 * conf->power_level;
++		ath9k_ps_wakeup(sc);
+ 		ath_update_txpow(sc);
++		ath9k_ps_restore(sc);
+ 	}
+ 
+ 	if (disable_radio) {