From: Ben Hutchings <bhutchings@solarflare.com>
Date: Thu, 8 May 2008 09:53:17 +0000 (-0700)
Subject: net: Added ASSERT_RTNL() to dev_open() and dev_close().
X-Git-Tag: firefly_0821_release~20319^2~22
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=e46b66bc42b6b1430b04cc5c207ecb2b2f4553dc;p=firefly-linux-kernel-4.4.55.git

net: Added ASSERT_RTNL() to dev_open() and dev_close().

dev_open() and dev_close() must be called holding the RTNL, since they
call device functions and netdevice notifiers that are promised the RTNL.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/core/dev.c b/net/core/dev.c
index 4addaf0df96e..a1607bc0cd4c 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -994,6 +994,8 @@ int dev_open(struct net_device *dev)
 {
 	int ret = 0;
 
+	ASSERT_RTNL();
+
 	/*
 	 *	Is it already up?
 	 */
@@ -1060,6 +1062,8 @@ int dev_open(struct net_device *dev)
  */
 int dev_close(struct net_device *dev)
 {
+	ASSERT_RTNL();
+
 	might_sleep();
 
 	if (!(dev->flags & IFF_UP))