mac80211: use station mutex in configuration

There's no need to use RCU here, we can just lock the station mutex instead. This allows the code to sleep, which is necessary for later patches. Signed-off-by: Johannes Berg <[email protected]> Signed-off-by: John W. Linville <[email protected]>
goeke · Dec 15, 2011 · 87be1e1 · 87be1e1
1 parent 92b62f2
commit 87be1e1
Showing 1 changed file with 6 additions and 6 deletions.
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
@@ -954,19 +954,19 @@ static int ieee80211_change_station(struct wiphy *wiphy,
 	struct sta_info *sta;
 	struct ieee80211_sub_if_data *vlansdata;
 
-	rcu_read_lock();
+	mutex_lock(&local->sta_mtx);
 
 	sta = sta_info_get_bss(sdata, mac);
 	if (!sta) {
-		rcu_read_unlock();
+		mutex_unlock(&local->sta_mtx);
 		return -ENOENT;
 	}
 
 	/* in station mode, supported rates are only valid with TDLS */
 	if (sdata->vif.type == NL80211_IFTYPE_STATION &&
 	    params->supported_rates &&
 	    !test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
-		rcu_read_unlock();
+		mutex_unlock(&local->sta_mtx);
 		return -EINVAL;
 	}
 
@@ -975,13 +975,13 @@ static int ieee80211_change_station(struct wiphy *wiphy,
 
 		if (vlansdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
 		    vlansdata->vif.type != NL80211_IFTYPE_AP) {
-			rcu_read_unlock();
+			mutex_unlock(&local->sta_mtx);
 			return -EINVAL;
 		}
 
 		if (params->vlan->ieee80211_ptr->use_4addr) {
 			if (vlansdata->u.vlan.sta) {
-				rcu_read_unlock();
+				mutex_unlock(&local->sta_mtx);
 				return -EBUSY;
 			}
 
@@ -997,7 +997,7 @@ static int ieee80211_change_station(struct wiphy *wiphy,
 	if (test_sta_flag(sta, WLAN_STA_TDLS_PEER) && params->supported_rates)
 		rate_control_rate_init(sta);
 
-	rcu_read_unlock();
+	mutex_unlock(&local->sta_mtx);
 
 	if (sdata->vif.type == NL80211_IFTYPE_STATION &&
 	    params->sta_flags_mask & BIT(NL80211_STA_FLAG_AUTHORIZED))