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

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Message-ID: <20070225132855.324a0b36@lxorguk.ukuu.org.uk>
Date:	Sun, 25 Feb 2007 13:28:55 +0000
From:	Alan <alan@...rguk.ukuu.org.uk>
To:	Jeff Garzik <jeff@...zik.org>
Cc:	Tejun Heo <htejun@...il.com>, 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()

On Sat, 24 Feb 2007 20:51:27 -0500
Jeff Garzik <jeff@...zik.org> wrote:

> 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?

It doesn't appear to, instead it fixes further cases.
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