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mac80211: release sched_scan_sdata when stopping sched scan 

Assuming sched_scan_stop operation is synchronous the driver may not
necessary call ieee80211_sched_scan_stopped_work. Since this work is
the only place where sched_scan_sdata is released we can possibly run
into situation when it is never released. Fix this by releasing it
just after calling drv_sched_scan_stop.

Signed-off-by: Alexander Bondar <alexander.bondar@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Alexander Bondar 2014-03-16 10:49:54 +02:00 committed by Johannes Berg
parent 112c44b2df
commit 71228a1eab
1 changed files with 4 additions and 2 deletions
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6
net/mac80211/scan.c
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@ -1055,9 +1055,11 @@ int ieee80211_request_sched_scan_stop(struct ieee80211_sub_if_data *sdata)
/* We don't want to restart sched scan anymore. */ /* We don't want to restart sched scan anymore. */
local->sched_scan_req = NULL; local->sched_scan_req = NULL;
if (rcu_access_pointer(local->sched_scan_sdata)) if (rcu_access_pointer(local->sched_scan_sdata)) {
ret = drv_sched_scan_stop(local, sdata); ret = drv_sched_scan_stop(local, sdata);
if (!ret)
rcu_assign_pointer(local->sched_scan_sdata, NULL);
}
out: out:
mutex_unlock(&local->mtx); mutex_unlock(&local->mtx);