diff options
| -rw-r--r-- | package/mac80211/patches/527-ath9k_ps_survey_fix.patch | 54 |
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 | |