netdev - Re: [PATCH] fix mv643xx_eth.c lockdep violation

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Date:	Thu, 16 May 2013 14:57:06 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	linux@....linux.org.uk
Cc:	eric.dumazet@...il.com, buytenh@...tstofly.org,
	netdev@...r.kernel.org
Subject: Re: [PATCH] fix mv643xx_eth.c lockdep violation

From: Russell King - ARM Linux <linux@....linux.org.uk>
Date: Thu, 16 May 2013 17:31:42 +0100

> From: Russell King <rmk+kernel@....linux.org.uk>
> Subject: [PATCH] NET: mv643xx_eth: avoid lockdep dump on interface down
> 
> When the interface is shutdown, the mv643xx_eth driver hits the following
> lockdep dump:
 ...
> It seems that txq_reclaim() takes the netif tx lock:
> 
>         __netif_tx_lock(nq, smp_processor_id());
> 
> in a context outside of softirq context, and thus is susceptible to
> deadlock should an interrupt occur.
> 
> Use __netif_tx_lock_bh()/__netif_tx_unlock_bh() instead.
> 
> Signed-off-by: Russell King <rmk+kernel@....linux.org.uk>

Applied, thanks.
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