netdev - Re: [PATCH 1/1] Fix hang on IBM Token Ring PCMCIA card ejection

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Message-ID: <46400863.7010003@garzik.org>
Date:	Tue, 08 May 2007 01:19:31 -0400
From:	Jeff Garzik <jeff@...zik.org>
To:	Paul Walmsley <paul@...yaka.com>
CC:	mikep@...uxtr.net, netdev@...r.kernel.org, linux-tr@...uxtr.net
Subject: Re: [PATCH 1/1] Fix hang on IBM Token Ring PCMCIA card ejection

Paul Walmsley wrote:
> From: Paul Walmsley <paul@...yaka.com>
> 
> Ejecting a PCMCIA IBM Token Ring card that has not had its dev->open()
> called will reliably trigger an uninitialized spinlock oops when
> spinlock debugging is enabled. The system then hangs, occasionally
> softlockup oopsing.  It seems that ibmtr.c:tok_interrupt() doesn't
> expect to be called before tok_open() is called, but tok_interrupt()
> gets called anyway when the card is ejected.  So, set an already-extant
> flag which causes tok_interrupt() to bail out early upon card ejection.
> Tested by inserting and removing the PCMCIA card several times.
> 
> Applies against 2.6.21-rc5.
> 
> 
> Signed-off-by: Paul Walmsley <paul@...yaka.com>

ACK but does not apply


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