diff options
Diffstat (limited to 'drivers/net/wireless/ath/ath9k/main.c')
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/main.c | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c index bd1e2de..55c6696 100644 --- a/drivers/net/wireless/ath/ath9k/main.c +++ b/drivers/net/wireless/ath/ath9k/main.c @@ -2701,8 +2701,15 @@ static int ath9k_config(struct ieee80211_hw *hw, u32 changed) } } + /* + * We just prepare to enable PS. We have to wait until our AP has + * ACK'd our null data frame to disable RX otherwise we'll ignore + * those ACKs and end up retransmitting the same null data frames. + * IEEE80211_CONF_CHANGE_PS is only passed by mac80211 for STA mode. + */ if (changed & IEEE80211_CONF_CHANGE_PS) { if (conf->flags & IEEE80211_CONF_PS) { + sc->sc_flags |= SC_OP_PS_ENABLED; if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) { if ((sc->imask & ATH9K_INT_TIM_TIMER) == 0) { @@ -2710,11 +2717,20 @@ static int ath9k_config(struct ieee80211_hw *hw, u32 changed) ath9k_hw_set_interrupts(sc->sc_ah, sc->imask); } - ath9k_hw_setrxabort(sc->sc_ah, 1); } - sc->ps_enabled = true; + /* + * At this point we know hardware has received an ACK + * of a previously sent null data frame. + */ + if ((sc->sc_flags & SC_OP_NULLFUNC_COMPLETED)) { + sc->sc_flags &= ~SC_OP_NULLFUNC_COMPLETED; + sc->ps_enabled = true; + ath9k_hw_setrxabort(sc->sc_ah, 1); + } } else { sc->ps_enabled = false; + sc->sc_flags &= ~(SC_OP_PS_ENABLED | + SC_OP_NULLFUNC_COMPLETED); ath9k_setpower(sc, ATH9K_PM_AWAKE); if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) { |