4 files changed, 19 insertions, 12 deletions

diff --git a/net/wireless/core.c b/net/wireless/core.c
index f256b4f7e83..2006a4ee60e 100644
--- a/net/wireless/core.c
+++ b/net/wireless/core.c
@@ -464,7 +464,7 @@ static int cfg80211_netdev_notifier_call(struct notifier_block * nb,
 			break;
 		if (!dev->ieee80211_ptr->ssid_len)
 			break;
-		cfg80211_leave_ibss(rdev, dev);
+		cfg80211_leave_ibss(rdev, dev, true);
 		break;
 	case NETDEV_UP:
 #ifdef CONFIG_WIRELESS_EXT
diff --git a/net/wireless/core.h b/net/wireless/core.h
index 89a8159ef0b..3e49d339931 100644
--- a/net/wireless/core.h
+++ b/net/wireless/core.h
@@ -147,8 +147,8 @@ void cfg80211_bss_age(struct cfg80211_registered_device *dev,
 int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
 		       struct net_device *dev,
 		       struct cfg80211_ibss_params *params);
-void cfg80211_clear_ibss(struct net_device *dev);
+void cfg80211_clear_ibss(struct net_device *dev, bool nowext);
 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
-			struct net_device *dev);
+			struct net_device *dev, bool nowext);
 
 #endif /* __NET_WIRELESS_CORE_H */
diff --git a/net/wireless/ibss.c b/net/wireless/ibss.c
index 4e1fcb0c9e4..b5c601e1b1b 100644
--- a/net/wireless/ibss.c
+++ b/net/wireless/ibss.c
@@ -76,7 +76,7 @@ int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
 	return 0;
 }
 
-void cfg80211_clear_ibss(struct net_device *dev)
+void cfg80211_clear_ibss(struct net_device *dev, bool nowext)
 {
 	struct wireless_dev *wdev = dev->ieee80211_ptr;
 
@@ -88,10 +88,14 @@ void cfg80211_clear_ibss(struct net_device *dev)
 	wdev->current_bss = NULL;
 	wdev->ssid_len = 0;
 	memset(wdev->bssid, 0, ETH_ALEN);
+#ifdef CONFIG_WIRELESS_EXT
+	if (!nowext)
+		wdev->wext.ssid_len = 0;
+#endif
 }
 
 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
-			struct net_device *dev)
+			struct net_device *dev, bool nowext)
 {
 	int err;
 
@@ -100,7 +104,7 @@ int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
 	if (err)
 		return err;
 
-	cfg80211_clear_ibss(dev);
+	cfg80211_clear_ibss(dev, nowext);
 
 	return 0;
 }
@@ -179,7 +183,8 @@ int cfg80211_ibss_wext_siwfreq(struct net_device *dev,
 		return 0;
 
 	if (wdev->ssid_len) {
-		err = cfg80211_leave_ibss(wiphy_to_dev(wdev->wiphy), dev);
+		err = cfg80211_leave_ibss(wiphy_to_dev(wdev->wiphy),
+					  dev, true);
 		if (err)
 			return err;
 	}
@@ -241,7 +246,8 @@ int cfg80211_ibss_wext_siwessid(struct net_device *dev,
 		return -EOPNOTSUPP;
 
 	if (wdev->ssid_len) {
-		err = cfg80211_leave_ibss(wiphy_to_dev(wdev->wiphy), dev);
+		err = cfg80211_leave_ibss(wiphy_to_dev(wdev->wiphy),
+					  dev, true);
 		if (err)
 			return err;
 	}
@@ -275,7 +281,7 @@ int cfg80211_ibss_wext_giwessid(struct net_device *dev,
 		data->flags = 1;
 		data->length = wdev->ssid_len;
 		memcpy(ssid, wdev->ssid, data->length);
-	} else if (wdev->wext.ssid) {
+	} else if (wdev->wext.ssid && wdev->wext.ssid_len) {
 		data->flags = 1;
 		data->length = wdev->wext.ssid_len;
 		memcpy(ssid, wdev->wext.ssid, data->length);
@@ -318,7 +324,8 @@ int cfg80211_ibss_wext_siwap(struct net_device *dev,
 		return 0;
 
 	if (wdev->ssid_len) {
-		err = cfg80211_leave_ibss(wiphy_to_dev(wdev->wiphy), dev);
+		err = cfg80211_leave_ibss(wiphy_to_dev(wdev->wiphy),
+					  dev, true);
 		if (err)
 			return err;
 	}
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 5a9a5c6c71d..97bb5c80125 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -833,7 +833,7 @@ static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
 
 	if (dev && !err && (ntype != otype)) {
 		if (otype == NL80211_IFTYPE_ADHOC)
-			cfg80211_clear_ibss(dev);
+			cfg80211_clear_ibss(dev, false);
 	}
 
  unlock:
@@ -3249,7 +3249,7 @@ static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
 		goto out;
 	}
 
-	err = cfg80211_leave_ibss(drv, dev);
+	err = cfg80211_leave_ibss(drv, dev, false);
 
 out:
 	cfg80211_put_dev(drv);