From: Johannes Berg <johannes.berg@intel.com>
Date: Wed, 16 Mar 2016 13:29:08 +0000 (+0100)
Subject: wext: unregister_pernet_subsys() on notifier registration failure
X-Git-Tag: v4.7-rc1~154^2~326^2~54
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=98bd147d7903580ca5d5dfa0bc39c2d16714d84e;p=platform%2Fkernel%2Flinux-exynos.git

wext: unregister_pernet_subsys() on notifier registration failure

If register_netdevice_notifier() fails (which in practice it can't
right now), we should call unregister_pernet_subsys(). Do that.

Reported-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
---

diff --git a/net/wireless/wext-core.c b/net/wireless/wext-core.c
index b50ee5d..6250b1c 100644
--- a/net/wireless/wext-core.c
+++ b/net/wireless/wext-core.c
@@ -399,7 +399,10 @@ static int __init wireless_nlevent_init(void)
 	if (err)
 		return err;
 
-	return register_netdevice_notifier(&wext_netdev_notifier);
+	err = register_netdevice_notifier(&wext_netdev_notifier);
+	if (err)
+		unregister_pernet_subsys(&wext_pernet_ops);
+	return err;
 }
 
 subsys_initcall(wireless_nlevent_init);