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Message-ID: <9a8748490602261049q32146506vdbd54fa833acbbd4@mail.gmail.com>
Date: Sun, 26 Feb 2006 19:49:38 +0100
From: "Jesper Juhl" <jesper.juhl@gmail.com>
To: "Robert Hancock" <hancockr@shaw.ca>
Subject: Re: hda: irq timeout: status=0xd0 DMA question
Cc: linux-kernel <linux-kernel@vger.kernel.org>
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On 2/26/06, Robert Hancock <hancockr@shaw.ca> wrote:
> Henrik Persson wrote:
> > Does happen once or twice a year.. Probably something funky with the
> > cabling or some power-related issues.
> >
> > Anyway, I would be happy if the IDE driver would "just not do that". :)
>
> I can see the reasoning where the device just doesn't function properly
> with DMA at all (like on some Compact Flash-to-IDE adapters where the
> card claims to support DMA but the DMA lines aren't wired through in the
> adapter properly). In that case not disabling DMA would render it
> useless. The IDE layer could keep track of whether DMA was previously
> working on that device however, and not disable DMA on reset if it had
> previously been working.
>
That might be even better than an option to tell the driver "I don't
want you to disable DMA on reset".

--
Jesper Juhl <jesper.juhl@gmail.com>
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