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mac80211: Ensure off-channel frames don't get queued

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Commit 6c17b77b67 (mac80211: Fix tx queue
handling during scans) contains a bug that causes off-channel frames to
get queued when they should be handed down to the driver for transmit.
Prevent this from happening.

Reported-by: Fabio Rossi <rossi.f@inwind.it>
Signed-off-by: Seth Forshee <seth.forshee@canonical.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Seth Forshee 2013-02-25 14:58:05 -06:00 committed by Johannes Berg
parent 163df6cf29
commit a7679ed5a0
1 changed files with 31 additions and 25 deletions
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56
net/mac80211/tx.c
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@ -1231,34 +1231,40 @@ static bool ieee80211_tx_frags(struct ieee80211_local *local,
if (local->queue_stop_reasons[q] ||
(!txpending && !skb_queue_empty(&local->pending[q]))) {
if (unlikely(info->flags &
IEEE80211_TX_INTFL_OFFCHAN_TX_OK &&
local->queue_stop_reasons[q] &
~BIT(IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL))) {
IEEE80211_TX_INTFL_OFFCHAN_TX_OK)) {
if (local->queue_stop_reasons[q] &
~BIT(IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL)) {
/*
* Drop off-channel frames if queues
* are stopped for any reason other
* than off-channel operation. Never
* queue them.
*/
spin_unlock_irqrestore(
&local->queue_stop_reason_lock,
flags);
ieee80211_purge_tx_queue(&local->hw,
skbs);
return true;
}
} else {
/*
* Drop off-channel frames if queues are stopped
* for any reason other than off-channel
* operation. Never queue them.
* Since queue is stopped, queue up frames for
* later transmission from the tx-pending
* tasklet when the queue is woken again.
*/
spin_unlock_irqrestore(
&local->queue_stop_reason_lock, flags);
ieee80211_purge_tx_queue(&local->hw, skbs);
return true;
if (txpending)
skb_queue_splice_init(skbs,
&local->pending[q]);
else
skb_queue_splice_tail_init(skbs,
&local->pending[q]);
spin_unlock_irqrestore(&local->queue_stop_reason_lock,
flags);
return false;
}
/*
* Since queue is stopped, queue up frames for later
* transmission from the tx-pending tasklet when the
* queue is woken again.
*/
if (txpending)
skb_queue_splice_init(skbs, &local->pending[q]);
else
skb_queue_splice_tail_init(skbs,
&local->pending[q]);
spin_unlock_irqrestore(&local->queue_stop_reason_lock,
flags);
return false;
}
spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);