netdev - Re: BUG: double spinlock in "drivers/net/3c505.c"

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Message-Id: <20100617.201216.115931147.davem@davemloft.net>
Date:	Thu, 17 Jun 2010 20:12:16 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	chf.fritz@...glemail.com
Cc:	strakh@...ras.ru, philb@....org, craigs@...luki.apana.org.au,
	tridge@...bus.anu.edu.au, Alan.Cox@...ux.org,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: BUG: double spinlock in "drivers/net/3c505.c"

From: Christoph Fritz <chf.fritz@...glemail.com>
Date: Tue, 08 Jun 2010 15:26:45 +0200

> On Mon, 2010-06-07 at 15:17 +0400, Alexander Strakh wrote: 
>> 	KERNEL_VERSION: 2.6.35-rc1
>>         SUBJECT: duble spinlock  in function elp_start_xmit
> 
> Not only in elp_start_xmit. This driver is for a pretty old and slow isa
> ethernet card and I think nobody cares. To quote a comment from the
> source: "[...] the concurrency protection is particularly awful".

Indeed, I spent some time trying to unravel the locking mess
for these call chains to check_3c505_dma() and it was just
too much to sanely cure.
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