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 4addaf0..a1607bc 100644 (file)
--- 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))