linux-kernel - Re: [PATCH] libata drain fifo on stuck DRQ HSM violation

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Message-ID: <20070928112735.264733ad@the-village.bc.nu>
Date:	Fri, 28 Sep 2007 11:27:35 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Mark Lord <liml@....ca>
Cc:	Tejun Heo <htejun@...il.com>, Jeff Garzik <jgarzik@...ox.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	michal.k.k.piotrowski@...il.com, bryan@...ores.ca,
	linux-kernel@...r.kernel.org, linux-ide@...r.kernel.org
Subject: Re: [PATCH] libata drain fifo on stuck DRQ HSM violation

> 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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