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>

parent a8cd57b3

net/mac80211/cfg.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -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);