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mac80211: complete scan work immediately if quiesced or suspended

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It is possible that a deferred scan is queued after the queues are
flushed in __ieee80211_suspend().  The deferred scan work may be
scheduled by ROC or ieee80211_stop_poll().

To make sure don't start a new scan while suspending, check whether
we're quiescing or suspended and complete the scan immediately if
that's the case.

Signed-off-by: Luciano Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Luciano Coelho 2015-01-22 23:34:10 +02:00 committed by Johannes Berg
parent 4afaff176a
commit 332ff7fe36
1 changed files with 5 additions and 0 deletions
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5
net/mac80211/scan.c
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@ -828,6 +828,11 @@ void ieee80211_scan_work(struct work_struct *work)
mutex_lock(&local->mtx);
if (!ieee80211_can_run_worker(local)) {
aborted = true;
goto out_complete;
}
sdata = rcu_dereference_protected(local->scan_sdata,
lockdep_is_held(&local->mtx));
scan_req = rcu_dereference_protected(local->scan_req,