diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c index 863d59fe6886f9d63a3bd9dccb6e6b08d3b3bbdf..8dabe66fc37ff7b915444491c9961f32d434da34 100644 --- a/net/mac80211/sta_info.c +++ b/net/mac80211/sta_info.c @@ -709,6 +709,39 @@ static bool sta_info_cleanup_expire_buffered(struct ieee80211_local *local, if (!sta->sdata->bss) return false; + /* + * First check for frames that should expire on the filtered + * queue. Frames here were rejected by the driver and are on + * a separate queue to avoid reordering with normal PS-buffered + * frames. They also aren't accounted for right now in the + * total_ps_buffered counter. + */ + for (;;) { + spin_lock_irqsave(&sta->tx_filtered.lock, flags); + skb = skb_peek(&sta->tx_filtered); + if (sta_info_buffer_expired(sta, skb)) + skb = __skb_dequeue(&sta->tx_filtered); + else + skb = NULL; + spin_unlock_irqrestore(&sta->tx_filtered.lock, flags); + + /* + * Frames are queued in order, so if this one + * hasn't expired yet we can stop testing. If + * we actually reached the end of the queue we + * also need to stop, of course. + */ + if (!skb) + break; + dev_kfree_skb(skb); + } + + /* + * Now also check the normal PS-buffered queue, this will + * only find something if the filtered queue was emptied + * since the filtered frames are all before the normal PS + * buffered frames. + */ for (;;) { spin_lock_irqsave(&sta->ps_tx_buf.lock, flags); skb = skb_peek(&sta->ps_tx_buf); @@ -718,6 +751,11 @@ static bool sta_info_cleanup_expire_buffered(struct ieee80211_local *local, skb = NULL; spin_unlock_irqrestore(&sta->ps_tx_buf.lock, flags); + /* + * frames are queued in order, so if this one + * hasn't expired yet (or we reached the end of + * the queue) we can stop testing + */ if (!skb) break; @@ -727,13 +765,22 @@ static bool sta_info_cleanup_expire_buffered(struct ieee80211_local *local, sta->sta.addr); #endif dev_kfree_skb(skb); - - /* if the queue is now empty recalc TIM bit */ - if (skb_queue_empty(&sta->ps_tx_buf)) - sta_info_recalc_tim(sta); } - return !skb_queue_empty(&sta->ps_tx_buf); + /* + * Finally, recalculate the TIM bit for this station -- it might + * now be clear because the station was too slow to retrieve its + * frames. + */ + sta_info_recalc_tim(sta); + + /* + * Return whether there are any frames still buffered, this is + * used to check whether the cleanup timer still needs to run, + * if there are no frames we don't need to rearm the timer. + */ + return !(skb_queue_empty(&sta->ps_tx_buf) && + skb_queue_empty(&sta->tx_filtered)); } static int __must_check __sta_info_destroy(struct sta_info *sta) diff --git a/net/mac80211/status.c b/net/mac80211/status.c index 8354dcb0e1e31c29a3d1853a936114feed876a2c..783542a8ea20c96cc3baf69d617feaf73ac7e349 100644 --- a/net/mac80211/status.c +++ b/net/mac80211/status.c @@ -107,6 +107,11 @@ static void ieee80211_handle_filtered_frame(struct ieee80211_local *local, skb_queue_len(&sta->tx_filtered) < STA_MAX_TX_BUFFER) { skb_queue_tail(&sta->tx_filtered, skb); sta_info_recalc_tim(sta); + + if (!timer_pending(&local->sta_cleanup)) + mod_timer(&local->sta_cleanup, + round_jiffies(jiffies + + STA_INFO_CLEANUP_INTERVAL)); return; }