[PATCH] mac80211: fix virtual interface locking

[deliverable/linux.git] / net / mac80211 / ieee80211_sta.c

diff --git a/net/mac80211/ieee80211_sta.c b/net/mac80211/ieee80211_sta.c
index 17455c6a5229356f9ede4dcfb829dd31de62d14b..651aaba1add495bf9278985541636252f94e92c7 100644 (file)
--- a/net/mac80211/ieee80211_sta.c
+++ b/net/mac80211/ieee80211_sta.c
@@ -2676,8 +2676,8 @@ void ieee80211_scan_completed(struct ieee80211_hw *hw)
        memset(&wrqu, 0, sizeof(wrqu));
        wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
 
-       read_lock(&local->sub_if_lock);
-       list_for_each_entry(sdata, &local->sub_if_list, list) {
+       rcu_read_lock();
+       list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 
                /* No need to wake the master device. */
                if (sdata->dev == local->mdev)
@@ -2691,7 +2691,7 @@ void ieee80211_scan_completed(struct ieee80211_hw *hw)
 
                netif_wake_queue(sdata->dev);
        }
-       read_unlock(&local->sub_if_lock);
+       rcu_read_unlock();
 
        sdata = IEEE80211_DEV_TO_SUB_IF(dev);
        if (sdata->type == IEEE80211_IF_TYPE_IBSS) {
@@ -2828,8 +2828,8 @@ static int ieee80211_sta_start_scan(struct net_device *dev,
 
        local->sta_scanning = 1;
 
-       read_lock(&local->sub_if_lock);
-       list_for_each_entry(sdata, &local->sub_if_list, list) {
+       rcu_read_lock();
+       list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 
                /* Don't stop the master interface, otherwise we can't transmit
                 * probes! */
@@ -2841,7 +2841,7 @@ static int ieee80211_sta_start_scan(struct net_device *dev,
                    (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
                        ieee80211_send_nullfunc(local, sdata, 1);
        }
-       read_unlock(&local->sub_if_lock);
+       rcu_read_unlock();
 
        if (ssid) {
                local->scan_ssid_len = ssid_len;