Date: Fri, 28 Sep 2007 11:27:35 +0100
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Mark Lord <liml@rtr.ca>
Cc: Tejun Heo <htejun@gmail.com>, Jeff Garzik <jgarzik@pobox.com>,
       Andrew Morton <akpm@linux-foundation.org>,
       michal.k.k.piotrowski@gmail.com, bryan@arbores.ca,
       linux-kernel@vger.kernel.org, linux-ide@vger.kernel.org
Subject: Re: [PATCH] libata drain fifo on stuck DRQ HSM violation
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> Drain up to 512 words from host/bridge FIFO on stuck DRQ HSM violation,
> rather than just getting stuck there forever.

Why 512 words ?


>  	ata_altstatus(ap);
> -	ata_chk_status(ap);
> +	ata_drain_fifo(ap, qc);

ap->ops->cleanup();

might be wiser
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