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-rw-r--r--package/mac80211/patches/527-ath9k_ps_survey_fix.patch54
1 files changed, 54 insertions, 0 deletions
diff --git a/package/mac80211/patches/527-ath9k_ps_survey_fix.patch b/package/mac80211/patches/527-ath9k_ps_survey_fix.patch
new file mode 100644
index 000000000..f130f4132
--- /dev/null
+++ b/package/mac80211/patches/527-ath9k_ps_survey_fix.patch
@@ -0,0 +1,54 @@
+--- a/drivers/net/wireless/ath/ath9k/main.c
++++ b/drivers/net/wireless/ath/ath9k/main.c
+@@ -122,6 +122,7 @@ bool ath9k_setpower(struct ath_softc *sc
+
+ void ath9k_ps_wakeup(struct ath_softc *sc)
+ {
++ struct ath_common *common = ath9k_hw_common(sc->sc_ah);
+ unsigned long flags;
+
+ spin_lock_irqsave(&sc->sc_pm_lock, flags);
+@@ -130,18 +131,33 @@ void ath9k_ps_wakeup(struct ath_softc *s
+
+ ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_AWAKE);
+
++ /*
++ * While the hardware is asleep, the cycle counters contain no
++ * useful data. Better clear them now so that they don't mess up the
++ * ANI or 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);
++
+ unlock:
+ spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
+ }
+
+ void ath9k_ps_restore(struct ath_softc *sc)
+ {
++ struct ath_common *common = ath9k_hw_common(sc->sc_ah);
+ unsigned long flags;
+
+ spin_lock_irqsave(&sc->sc_pm_lock, flags);
+ if (--sc->ps_usecount != 0)
+ goto unlock;
+
++ spin_lock(&common->cc_lock);
++ ath_hw_cycle_counters_update(common);
++ spin_unlock(&common->cc_lock);
++
+ if (sc->ps_idle)
+ ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_FULL_SLEEP);
+ else if (sc->ps_enabled &&
+@@ -197,7 +213,8 @@ static void ath_update_survey_stats(stru
+ struct ath_cycle_counters *cc = &common->cc_survey;
+ unsigned int div = common->clockrate * 1000;
+
+- ath_hw_cycle_counters_update(common);
++ if (ah->power_mode == ATH9K_PM_AWAKE)
++ ath_hw_cycle_counters_update(common);
+
+ if (cc->cycles > 0) {
+ survey->filled |= SURVEY_INFO_CHANNEL_TIME |