package/mac80211/patches/520-ath9k_ps_survey_fix.patch

   1 --- a/drivers/net/wireless/ath/ath9k/main.c
   2 +++ b/drivers/net/wireless/ath/ath9k/main.c
   3 @@ -122,6 +122,7 @@ bool ath9k_setpower(struct ath_softc *sc
   4
   5  void ath9k_ps_wakeup(struct ath_softc *sc)
   6  {
   7 +       struct ath_common *common = ath9k_hw_common(sc->sc_ah);
   8         unsigned long flags;
   9
  10         spin_lock_irqsave(&sc->sc_pm_lock, flags);
  11 @@ -130,18 +131,33 @@ void ath9k_ps_wakeup(struct ath_softc *s
  12
  13         ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_AWAKE);
  14
  15 +       /*
  16 +        * While the hardware is asleep, the cycle counters contain no
  17 +        * useful data. Better clear them now so that they don't mess up the
  18 +        * ANI or survey data results.
  19 +        */
  20 +       spin_lock(&common->cc_lock);
  21 +       ath_hw_cycle_counters_update(common);
  22 +       memset(&common->cc_survey, 0, sizeof(common->cc_survey));
  23 +       spin_unlock(&common->cc_lock);
  24 +
  25   unlock:
  26         spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
  27  }
  28
  29  void ath9k_ps_restore(struct ath_softc *sc)
  30  {
  31 +       struct ath_common *common = ath9k_hw_common(sc->sc_ah);
  32         unsigned long flags;
  33
  34         spin_lock_irqsave(&sc->sc_pm_lock, flags);
  35         if (--sc->ps_usecount != 0)
  36                 goto unlock;
  37
  38 +       spin_lock(&common->cc_lock);
  39 +       ath_hw_cycle_counters_update(common);
  40 +       spin_unlock(&common->cc_lock);
  41 +
  42         if (sc->ps_idle)
  43                 ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_FULL_SLEEP);
  44         else if (sc->ps_enabled &&
  45 @@ -197,7 +213,8 @@ static void ath_update_survey_stats(stru
  46         struct ath_cycle_counters *cc = &common->cc_survey;
  47         unsigned int div = common->clockrate * 1000;
  48
  49 -       ath_hw_cycle_counters_update(common);
  50 +       if (ah->power_mode == ATH9K_PM_AWAKE)
  51 +               ath_hw_cycle_counters_update(common);
  52
  53         if (cc->cycles > 0) {
  54                 survey->filled |= SURVEY_INFO_CHANNEL_TIME |