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[TUN]: Fix RTNL-locking in tun/tap driver 

Current tun/tap driver sets also net device's hw address when asked to
change character device's hw address. This is a good idea, but it
misses RTLN-locking, resulting following error message in 2.6.25-rc3's
inetdev_event() function:

RTNL: assertion failed at net/ipv4/devinet.c (1050)

Attached patch fixes this problem.

Signed-off-by: Kim B. Heino <Kim.Heino@bluegiga.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Kim B. Heino 2008-02-29 12:26:21 -08:00 committed by David S. Miller
parent 459eea7410
commit 401023710d
1 changed files with 5 additions and 1 deletions
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6
drivers/net/tun.c
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@ -663,7 +663,11 @@ static int tun_chr_ioctl(struct inode *inode, struct file *file,
case SIOCSIFHWADDR:
{
/* try to set the actual net device's hw address */
int ret = dev_set_mac_address(tun->dev, &ifr.ifr_hwaddr);
int ret;
rtnl_lock();
ret = dev_set_mac_address(tun->dev, &ifr.ifr_hwaddr);
rtnl_unlock();
if (ret == 0) {
/** Set the character device's hardware address. This is used when