From: Tejun Heo <htejun@gmail.com>
To: Jeff Garzik <jeff@garzik.org>
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>
Subject: Re: libata fails to recover from HSM violation involving DRQ status
Date: Sun, 29 Apr 2007 16:45:20 +0900 [thread overview]
Message-ID: <46344D10.507@gmail.com> (raw)
In-Reply-To: <463414FA.5080802@garzik.org>
Jeff Garzik wrote:
> 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.
OIC, it's the SFF emulation which doesn't reset itself on SRST. So,
flipping PCS helps. Maybe we should do that in prereset?
--
tejun
next prev parent reply other threads:[~2007-04-29 7:45 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-04-28 20:15 libata fails to recover from HSM violation involving DRQ status Mark Lord
2007-04-28 20:18 ` Mark Lord
2007-04-28 20:30 ` Alan Cox
2007-04-28 20:37 ` Jeff Garzik
2007-04-28 20:44 ` Mark Lord
2007-04-28 20:50 ` Jeff Garzik
2007-04-28 21:25 ` Alan Cox
2007-04-28 21:35 ` Mark Lord
2007-04-28 21:38 ` Jeff Garzik
2007-04-28 21:41 ` Mark Lord
2007-04-29 3:17 ` Tejun Heo
2007-04-29 3:46 ` Jeff Garzik
2007-04-29 7:45 ` Tejun Heo [this message]
2007-04-29 3:51 ` Tejun Heo
2007-04-29 11:56 ` Mark Lord
2007-04-29 12:59 ` Mark Lord
2007-04-29 13:13 ` Mark Lord
2007-04-29 16:42 ` Tejun Heo
2007-04-29 16:47 ` Mark Lord
2007-04-29 18:49 ` Mark Lord
2007-04-29 19:05 ` Mark Lord
2007-04-30 0:59 ` Tejun Heo
2007-04-29 19:07 ` Mark Lord
2007-04-30 0:54 ` Tejun Heo
2007-04-30 3:42 ` Mark Lord
2007-04-30 3:58 ` Tejun Heo
2007-04-30 17:47 ` Mark Lord
2007-05-01 0:23 ` Mark Lord
2007-05-01 2:47 ` Tejun Heo
2007-05-01 13:00 ` Mark Lord
2007-05-11 3:33 ` Mark Lord
2007-05-11 3:35 ` Mark Lord
2007-04-29 12:07 ` Mark Lord
2007-04-29 16:36 ` Tejun Heo
2007-04-28 23:56 ` Alan Cox
2007-04-28 22:09 ` Mark Lord
2007-04-29 3:04 ` Tejun Heo
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