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mac80211: fix sdata locking around __ieee80211_request_smps 

My cfg80211/mac80211 locking unification broke the sdata
locking in ieee80211_set_power_mgmt, it needs to acquire
the lock for __ieee80211_request_smps(). Add the locking.

Reported-by: Jakub Kicinski <kubakici@wp.pl>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2013-06-03 13:51:59 +02:00
parent a8cd57b304
commit ed405be5cb
1 changed files with 2 additions and 0 deletions
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2
net/mac80211/cfg.c
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@ -2378,7 +2378,9 @@ static int ieee80211_set_power_mgmt(struct wiphy *wiphy, struct net_device *dev,
local->dynamic_ps_forced_timeout = timeout;
/* no change, but if automatic follow powersave */
sdata_lock(sdata);
__ieee80211_request_smps(sdata, sdata->u.mgd.req_smps);
sdata_unlock(sdata);
if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)
ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);