From: Doru Gucea <gucea.doru@xxxxxxxxx> Each time we receive a beacon we need to adjust the hardware timers for next DTIM and next TBTT. Before this commit, the Power Save behaviour was incorrect. The scenario was: - STA receives a beacon from AP with TIM unset; - mac80211 layers puts the chip to sleep; - chip is woken up by mac80211's software timer reponsible for beacon miss after 7 * beacon_interval period. Normally the chip should sleep at most DTIM period. This commit configures hardware timers for waking up the chip correctly. More details on the wiki: https://github.com/doru91/linux-stable/wiki/Single-Interface-Power-Save Signed-off-by: Doru Gucea <gucea.doru@xxxxxxxxx> --- drivers/net/wireless/ath/ath9k/htc_drv_main.c | 4 ++++ net/mac80211/mlme.c | 6 ++++++ 2 files changed, 10 insertions(+) diff --git a/drivers/net/wireless/ath/ath9k/htc_drv_main.c b/drivers/net/wireless/ath/ath9k/htc_drv_main.c index 172a9ff..59a76e0 100644 --- a/drivers/net/wireless/ath/ath9k/htc_drv_main.c +++ b/drivers/net/wireless/ath/ath9k/htc_drv_main.c @@ -1521,6 +1521,10 @@ static void ath9k_htc_bss_info_changed(struct ieee80211_hw *hw, mutex_lock(&priv->mutex); ath9k_htc_ps_wakeup(priv); + /* adjust beacon timers */ + if (changed && BSS_CHANGED_BEACON_INFO) + ath9k_htc_beacon_config(priv, vif); + if (changed & BSS_CHANGED_ASSOC) { ath_dbg(common, CONFIG, "BSS Changed ASSOC %d\n", bss_conf->assoc); diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c index cd7e55e..ce92a39 100644 --- a/net/mac80211/mlme.c +++ b/net/mac80211/mlme.c @@ -3536,6 +3536,12 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, sdata->vif.bss_conf.sync_dtim_count = 0; } + /* trigger hardware timers adjustment + * this needs to be done before beacon filtering + */ + changed |= BSS_CHANGED_BEACON_INFO; + ieee80211_bss_info_change_notify(sdata, changed); + if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid) return; ifmgd->beacon_crc = ncrc; -- 1.9.1
