diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 09d2e58..fd1020e 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -3854,7 +3854,7 @@
 		new_qos_map = NULL;
 	}
 
-	old_qos_map = rtnl_dereference(sdata->qos_map);
+	old_qos_map = sdata_dereference(sdata->qos_map, sdata);
 	rcu_assign_pointer(sdata->qos_map, new_qos_map);
 	if (old_qos_map)
 		kfree_rcu(old_qos_map, rcu_head);