55 lines
1.6 KiB
Diff
55 lines
1.6 KiB
Diff
--- a/drivers/net/wireless/ath/ath9k/main.c
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+++ b/drivers/net/wireless/ath/ath9k/main.c
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@@ -122,6 +122,7 @@ bool ath9k_setpower(struct ath_softc *sc
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void ath9k_ps_wakeup(struct ath_softc *sc)
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{
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+ struct ath_common *common = ath9k_hw_common(sc->sc_ah);
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unsigned long flags;
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spin_lock_irqsave(&sc->sc_pm_lock, flags);
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@@ -130,18 +131,33 @@ void ath9k_ps_wakeup(struct ath_softc *s
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ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_AWAKE);
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+ /*
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+ * While the hardware is asleep, the cycle counters contain no
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+ * useful data. Better clear them now so that they don't mess up the
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+ * ANI or survey data results.
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+ */
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+ spin_lock(&common->cc_lock);
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+ ath_hw_cycle_counters_update(common);
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+ memset(&common->cc_survey, 0, sizeof(common->cc_survey));
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+ spin_unlock(&common->cc_lock);
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+
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unlock:
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spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
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}
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void ath9k_ps_restore(struct ath_softc *sc)
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{
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+ struct ath_common *common = ath9k_hw_common(sc->sc_ah);
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unsigned long flags;
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spin_lock_irqsave(&sc->sc_pm_lock, flags);
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if (--sc->ps_usecount != 0)
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goto unlock;
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+ spin_lock(&common->cc_lock);
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+ ath_hw_cycle_counters_update(common);
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+ spin_unlock(&common->cc_lock);
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+
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if (sc->ps_idle)
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ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_FULL_SLEEP);
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else if (sc->ps_enabled &&
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@@ -197,7 +213,8 @@ static void ath_update_survey_stats(stru
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struct ath_cycle_counters *cc = &common->cc_survey;
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unsigned int div = common->clockrate * 1000;
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- ath_hw_cycle_counters_update(common);
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+ if (ah->power_mode == ATH9K_PM_AWAKE)
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+ ath_hw_cycle_counters_update(common);
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if (cc->cycles > 0) {
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survey->filled |= SURVEY_INFO_CHANNEL_TIME |
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