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>
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 9034da1..3062210 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -2378,7 +2378,9 @@
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);