Re: [PATCH] bridge: Fix potential deadlock on br->multicast_lock

[David Miller <davem@xxxxxxxxxxxxx>]

From: Andrew Vagin <avagin@xxxxxxxxxx>
Date: Thu, 10 Nov 2011 18:48:03 +0300

> multicast_lock is taken in softirq context, so we should use
> spin_lock_bh() in userspace.
> 
> call-chain in softirq context:
> run_timer_softirq()
> 	br_multicast_query_expired()
> 
> call-chain in userspace:
> sysfs_write_file()
> 	store_multicast_snooping()
> 		br_multicast_toggle()
> 
> Signed-off-by: Andrew Vagin <avagin@xxxxxxxxxx>

Applied, thanks.
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