[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: NKim B. Heino <Kim.Heino@bluegiga.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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