From 75a1b497bb5c5f73c9022c3b19b1b0b3e3260548 Mon Sep 17 00:00:00 2001
From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Tue, 13 Dec 2011 11:38:00 +0000
Subject: [PATCH] --- yaml --- r: 278788 b: refs/heads/master c:
 c63044f0d22a13532047ad04216af45b6ac7fdaf h: refs/heads/master v: v3

---
 [refs]                     |  2 +-
 trunk/net/core/rtnetlink.c | 25 ++++++++++++++-----------
 2 files changed, 15 insertions(+), 12 deletions(-)

diff --git a/[refs] b/[refs]
index ef86fae37450..57809a05d174 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: b43faac69062f0fc75bd3230d67da64e184232d1
+refs/heads/master: c63044f0d22a13532047ad04216af45b6ac7fdaf
diff --git a/trunk/net/core/rtnetlink.c b/trunk/net/core/rtnetlink.c
index 9083e82bdae5..dbf2ddafd52d 100644
--- a/trunk/net/core/rtnetlink.c
+++ b/trunk/net/core/rtnetlink.c
@@ -273,6 +273,17 @@ EXPORT_SYMBOL_GPL(rtnl_unregister_all);
 
 static LIST_HEAD(link_ops);
 
+static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind)
+{
+	const struct rtnl_link_ops *ops;
+
+	list_for_each_entry(ops, &link_ops, list) {
+		if (!strcmp(ops->kind, kind))
+			return ops;
+	}
+	return NULL;
+}
+
 /**
  * __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
  * @ops: struct rtnl_link_ops * to register
@@ -285,6 +296,9 @@ static LIST_HEAD(link_ops);
  */
 int __rtnl_link_register(struct rtnl_link_ops *ops)
 {
+	if (rtnl_link_ops_get(ops->kind))
+		return -EEXIST;
+
 	if (!ops->dellink)
 		ops->dellink = unregister_netdevice_queue;
 
@@ -351,17 +365,6 @@ void rtnl_link_unregister(struct rtnl_link_ops *ops)
 }
 EXPORT_SYMBOL_GPL(rtnl_link_unregister);
 
-static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind)
-{
-	const struct rtnl_link_ops *ops;
-
-	list_for_each_entry(ops, &link_ops, list) {
-		if (!strcmp(ops->kind, kind))
-			return ops;
-	}
-	return NULL;
-}
-
 static size_t rtnl_link_get_size(const struct net_device *dev)
 {
 	const struct rtnl_link_ops *ops = dev->rtnl_link_ops;