mac80211: lazily stop queues in add_pending

When adding pending SKBs there's no need to
stop all queues, we only need to stop those
that we're adding frames to. Implement that
by lazily stopping a queue as we add an SKB.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index ef725ca..471a831 100644 (file)
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -385,10 +385,6 @@ void ieee80211_add_pending_skbs_fn(struct ieee80211_local *local,
        int queue, i;
 
        spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
-       for (i = 0; i < hw->queues; i++)
-               __ieee80211_stop_queue(hw, i,
-                       IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
-
        while ((skb = skb_dequeue(skbs))) {
                struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 
@@ -398,6 +394,10 @@ void ieee80211_add_pending_skbs_fn(struct ieee80211_local *local,
                }
 
                queue = skb_get_queue_mapping(skb);
+
+               __ieee80211_stop_queue(hw, queue,
+                               IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
+
                __skb_queue_tail(&local->pending[queue], skb);
        }