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authorDenis Kenzior <denkenz@gmail.com>2016-08-04 00:58:35 +0300
committerJohannes Berg <johannes.berg@intel.com>2016-08-11 17:51:42 +0300
commit7f8ed01ea5d4d9d4acc3bb046de1fc84ac83a5e2 (patch)
tree6387f94b3e3e3ecc4a80e41c0f68b16e0ce59d4d /net/wireless/core.c
parent896ff0635a312022c91e2bef30c80abc27af62e8 (diff)
downloadlinux-7f8ed01ea5d4d9d4acc3bb046de1fc84ac83a5e2.tar.xz
cfg80211: always notify userspace when wireless netdev is removed
This change alters the semantics of NL80211_CMD_DEL_INTERFACE events by always sending this event whenever a net_device object associated with a wdev is destroyed. Prior to this change, this event was only emitted as a result of NL80211_CMD_DEL_INTERFACE command sent from userspace. This allows userspace to reliably detect when wireless interfaces have been removed, e.g. due to USB removal events, etc. For wireless device objects without an associated net_device (e.g. NL80211_IFTYPE_P2P_DEVICE), the NL80211_CMD_DEL_INTERFACE event is now generated inside cfg80211_unregister_wdev. Signed-off-by: Denis Kenzior <denkenz@gmail.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/wireless/core.c')
-rw-r--r--net/wireless/core.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/net/wireless/core.c b/net/wireless/core.c
index 7758c0fe781a..2029b49a1df3 100644
--- a/net/wireless/core.c
+++ b/net/wireless/core.c
@@ -906,6 +906,8 @@ void cfg80211_unregister_wdev(struct wireless_dev *wdev)
if (WARN_ON(wdev->netdev))
return;
+ nl80211_notify_iface(rdev, wdev, NL80211_CMD_DEL_INTERFACE);
+
list_del_rcu(&wdev->list);
rdev->devlist_generation++;
@@ -1159,6 +1161,8 @@ static int cfg80211_netdev_notifier_call(struct notifier_block *nb,
* remove and clean it up.
*/
if (!list_empty(&wdev->list)) {
+ nl80211_notify_iface(rdev, wdev,
+ NL80211_CMD_DEL_INTERFACE);
sysfs_remove_link(&dev->dev.kobj, "phy80211");
list_del_rcu(&wdev->list);
rdev->devlist_generation++;