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mac80211: debounce queue stop/wake 

When the queue status changes we need to do a fair
bit of work, so ignore no-op changes early.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Johannes Berg 2012-03-28 11:04:27 +02:00 committed by John W. Linville
parent ded81f6ba9
commit ada1512526
1 changed files with 6 additions and 0 deletions
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6
net/mac80211/util.c
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@ -276,6 +276,9 @@ static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
if (WARN_ON(queue >= hw->queues))
return;
if (!test_bit(reason, &local->queue_stop_reasons[queue]))
return;
__clear_bit(reason, &local->queue_stop_reasons[queue]);
if (local->queue_stop_reasons[queue] != 0)
@ -323,6 +326,9 @@ static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
if (WARN_ON(queue >= hw->queues))
return;
if (test_bit(reason, &local->queue_stop_reasons[queue]))
return;
__set_bit(reason, &local->queue_stop_reasons[queue]);
rcu_read_lock();