From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jeff Garzik <jeff@garzik.org>
Subject: Re: libata fails to recover from HSM violation involving DRQ status
Date: Sat, 28 Apr 2007 23:46:02 -0400
Message-ID: <463414FA.5080802@garzik.org>
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To: Tejun Heo <htejun@gmail.com>
Cc: Mark Lord <liml@rtr.ca>, Alan Cox <alan@lxorguk.ukuu.org.uk>, Alan Cox <alan@redhat.com>, IDE/ATA development list <linux-ide@vger.kernel.org>

Tejun Heo wrote:
> and thus clear DRQ, right?  Stuck DRQ after SRST seems odd to me.

Unfortunately not odd on ata_piix, which can get stuck DRQ-on somewhere 
deep inside its IDE emulation engine.  And neither draining the FIFO nor 
SRST nor a couple other tricks ever helped.  The only thing that seemed 
to make any difference was an enable/disable reset via our beloved PCS 
register.

	Jeff