mac80211: catch queue stop underflow
If some code stops the queues more times than having started (for when refcounting is used), warn on and reset the counter to 0 to avoid blocking forever. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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63b4d8b373
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856142cdaa
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@ -288,10 +288,13 @@ static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
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if (!test_bit(reason, &local->queue_stop_reasons[queue]))
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return;
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if (!refcounted)
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if (!refcounted) {
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local->q_stop_reasons[queue][reason] = 0;
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else
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} else {
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local->q_stop_reasons[queue][reason]--;
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if (WARN_ON(local->q_stop_reasons[queue][reason] < 0))
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local->q_stop_reasons[queue][reason] = 0;
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}
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if (local->q_stop_reasons[queue][reason] == 0)
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__clear_bit(reason, &local->queue_stop_reasons[queue]);
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