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mac80211: add comment for rx_path_lock

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Add a comment explaining how the RX path lock is used.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2015-03-16 09:08:20 +01:00
parent 4cc0dba95a
commit 45ceeee81e
1 changed files with 6 additions and 0 deletions
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6
net/mac80211/rx.c
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@ -3123,6 +3123,12 @@ static void ieee80211_rx_handlers(struct ieee80211_rx_data *rx,
goto rxh_next; \
} while (0);
/* Lock here to avoid hitting all of the data used in the RX
* path (e.g. key data, station data, ...) concurrently when
* a frame is released from the reorder buffer due to timeout
* from the timer, potentially concurrently with RX from the
* driver.
*/
spin_lock_bh(&rx->local->rx_path_lock);
while ((skb = __skb_dequeue(frames))) {