netdev - [PATCH 1/4] Added ASSERT_RTNL() to dev_open() and dev

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Message-ID: <20080506183405.GG2217@solarflare.com>
Date:	Tue, 6 May 2008 19:34:06 +0100
From:	Ben Hutchings <bhutchings@...arflare.com>
To:	David Miller <davem@...emloft.net>
Cc:	Jeff Garzik <jgarzik@...ox.com>, netdev@...r.kernel.org
Subject: [PATCH 1/4] 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@...arflare.com>
---
 net/core/dev.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/net/core/dev.c b/net/core/dev.c
index d334446..e76f4fd 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))

-- 
Ben Hutchings, Senior Software Engineer, Solarflare Communications
Not speaking for my employer; that's the marketing department's job.

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