linux-kernel - Re: [PATCH] libata: clear drvdata in ata_host

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Message-ID: <45E0EB9F.3050001@garzik.org>
Date:	Sat, 24 Feb 2007 20:51:27 -0500
From:	Jeff Garzik <jeff@...zik.org>
To:	Tejun Heo <htejun@...il.com>
CC:	Alan Cox <alan@...rguk.ukuu.org.uk>, linux-ide@...r.kernel.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Komuro <komurojun-mbn@...ty.com>
Subject: Re: [PATCH] libata: clear drvdata in ata_host_release()

Tejun Heo wrote:
> ata_host_release() uses drvdata to determine ata_host to release and
> clearing drvdata in ->remove_one causes NULL pointer deference.  Clear
> drvdata only in ata_host_release() after all resources are freed.
> 
> This bug was first analyzed by Alan Cox for pata_pcmcia.
> 
> Signed-off-by: Tejun Heo <htejun@...il.com>
> Cc: Alan Cox <alan@...rguk.ukuu.org.uk>
> ---
> Alan, this is the bug you talked about, right?  I took the fix from
> "[BUG] PATA_PCMCIA does not work" and expanded it.  If this isn't the
> one, please let me know.  Thanks.

Has a tester confirmed that this patch fixes the problem, and supercedes 
Alan's patch?

	Jeff


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