Merge tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm...

[~andy/linux] / net / mac80211 / tx.c

diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index 97a02d3f7d87720795e1518d27fce0bbaed9bc4f..4080c615636fabf3d430ecd898d4349ccd213464 100644 (file)
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -478,6 +478,20 @@ ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx)
                       sta->sta.addr, sta->sta.aid, ac);
                if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
                        purge_old_ps_buffers(tx->local);
+
+               /* sync with ieee80211_sta_ps_deliver_wakeup */
+               spin_lock(&sta->ps_lock);
+               /*
+                * STA woke up the meantime and all the frames on ps_tx_buf have
+                * been queued to pending queue. No reordering can happen, go
+                * ahead and Tx the packet.
+                */
+               if (!test_sta_flag(sta, WLAN_STA_PS_STA) &&
+                   !test_sta_flag(sta, WLAN_STA_PS_DRIVER)) {
+                       spin_unlock(&sta->ps_lock);
+                       return TX_CONTINUE;
+               }
+
                if (skb_queue_len(&sta->ps_tx_buf[ac]) >= STA_MAX_TX_BUFFER) {
                        struct sk_buff *old = skb_dequeue(&sta->ps_tx_buf[ac]);
                        ps_dbg(tx->sdata,
@@ -492,6 +506,7 @@ ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx)
                info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING;
                info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
                skb_queue_tail(&sta->ps_tx_buf[ac], tx->skb);
+               spin_unlock(&sta->ps_lock);
 
                if (!timer_pending(&local->sta_cleanup))
                        mod_timer(&local->sta_cleanup,