From: Alan Cox <alan@redhat.com>
To: Tejun Heo <htejun@gmail.com>
Cc: Jeff Garzik <jeff@garzik.org>,
Alan Cox <alan@lxorguk.ukuu.org.uk>,
Mikael Pettersson <mikpe@it.uu.se>,
Jeff Norden <jeff@math.tntech.edu>,
alan@redhat.com, linux-kernel@vger.kernel.org,
Albert CC Lee <albertcc@tw.ibm.com>,
IDE/ATA development list <linux-ide@vger.kernel.org>
Subject: Re: [PATCH 1/1] pata_it821x: fix lost interrupt with atapi devices
Date: Tue, 18 Sep 2007 05:14:00 -0400 [thread overview]
Message-ID: <20070918091400.GC13425@devserv.devel.redhat.com> (raw)
In-Reply-To: <46EE68F9.9050707@gmail.com>
On Mon, Sep 17, 2007 at 01:46:01PM +0200, Tejun Heo wrote:
> failures and would really like to know what's broken. The reason can be
> one of the following two.
>
> 1. libata itself isn't doing anything wrong but using SCSI for mid and
> high level drivers are causing problems as more types of commands are used.
>
> 2. Mode programming for MWDMA is broken. This doesn't seem too likely
> as we're seeing MWDMA failures across different low level drivers but is
> still a possibility.
3 and 4
3. Libata is wrong (it is in places)
4. Old IDE uses DMA much less for ATAPI especially
next prev parent reply other threads:[~2007-09-18 9:15 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-09-04 16:07 [PATCH 1/1] pata_it821x: fix lost interrupt with atapi devices Jeff Norden
2007-09-04 18:43 ` Mikael Pettersson
2007-09-06 0:39 ` Alan Cox
2007-09-17 5:00 ` Tejun Heo
2007-09-17 10:00 ` Jeff Garzik
2007-09-17 11:46 ` Tejun Heo
2007-09-18 9:14 ` Alan Cox [this message]
2007-09-18 9:07 ` Alan Cox
2007-09-11 1:53 ` Jeff Garzik
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