ath9k: fix cycle counter tracking

SVN-Revision: 23824

package/mac80211/patches/590-ath9k_fix_cycle_counter_ps.patch

@@ -0,0 +1,33 @@
+--- a/drivers/net/wireless/ath/ath9k/main.c
++++ b/drivers/net/wireless/ath/ath9k/main.c
+@@ -94,11 +94,13 @@ void ath9k_ps_wakeup(struct ath_softc *s
+ {
+ 	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
+ 	unsigned long flags;
++	enum ath9k_power_mode power_mode;
+ 
+ 	spin_lock_irqsave(&sc->sc_pm_lock, flags);
+ 	if (++sc->ps_usecount != 1)
+ 		goto unlock;
+ 
++	power_mode = sc->sc_ah->power_mode;
+ 	ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_AWAKE);
+ 
+ 	/*
+@@ -106,10 +108,12 @@ void ath9k_ps_wakeup(struct ath_softc *s
+ 	 * useful data. Better clear them now so that they don't mess up
+ 	 * survey data results.
+ 	 */
+-	spin_lock(&common->cc_lock);
+-	ath_hw_cycle_counters_update(common);
+-	memset(&common->cc_survey, 0, sizeof(common->cc_survey));
+-	spin_unlock(&common->cc_lock);
++	if (power_mode != ATH9K_PM_AWAKE) {
++		spin_lock(&common->cc_lock);
++		ath_hw_cycle_counters_update(common);
++		memset(&common->cc_survey, 0, sizeof(common->cc_survey));
++		spin_unlock(&common->cc_lock);
++	}
+ 
+  unlock:
+ 	spin_unlock_irqrestore(&sc->sc_pm_lock, flags);