netdev - Re: [PATCH] qlge: Fix a deadlock when the interface is going down

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Date:	Wed, 25 Aug 2010 16:38:51 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	ron.mercer@...gic.com
Cc:	leitao@...ux.vnet.ibm.com, netdev@...r.kernel.org
Subject: Re: [PATCH] qlge: Fix a deadlock when the interface is going down

From: Ron Mercer <ron.mercer@...gic.com>
Date: Wed, 25 Aug 2010 07:42:30 -0700

> On Tue, Aug 24, 2010 at 03:50:40PM -0700, leitao@...ux.vnet.ibm.com wrote:
>> Currently qlge can deadlock when the interface is going
>> down, and the mpi_port_cfg_work() is executing on another
>> processor. It happens because unregister_netdev() holds
>> the rtnl lock, and the mpi_port_cfg_work() also request
>> this lock.
>> 
>> Since unregiter_netdev() may wait mpi_port_cfg_work(), who
>> also request the holding lock, it can cause an deadlock,
>> displaying the following error:
>> 
> 
> Thanks Breno.
> 
> Signed-off-by: Ron Mercer <ron.mercer@...gic.com>

Applied.
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