From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: linux-ide@vger.kernel.org, Jeff Garzik <jgarzik@pobox.com>,
Tejun Heo <htejun@gmail.com>
Subject: Re: libata and DMA quirks
Date: Fri, 27 Jun 2008 19:29:43 +1000 [thread overview]
Message-ID: <1214558983.8011.542.camel@pasglop> (raw)
In-Reply-To: <20080627095454.665b7229@lxorguk.ukuu.org.uk>
On Fri, 2008-06-27 at 09:54 +0100, Alan Cox wrote:
> > a) For any ATAPI DMA, If the transfer size is not a multiple of 16
> > bytes, switch to PIO for this command.
>
> Old IDE does this internally. Tejun has done a lot of this stuff for the
> ATAPI layer in libata. See the check_atapi_dma method (example at
> it821x_check_atapi_dma with a size rule)
.../...
Thanks Alan. I'll look at those various examples and sort things
out.
Cheers,
Ben.
prev parent reply other threads:[~2008-06-27 9:30 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-06-27 6:41 libata and DMA quirks Benjamin Herrenschmidt
2008-06-27 8:37 ` Sergei Shtylyov
2008-06-27 8:51 ` Benjamin Herrenschmidt
2008-06-27 9:10 ` Sergei Shtylyov
2008-06-27 9:31 ` Benjamin Herrenschmidt
2008-06-27 8:54 ` Alan Cox
2008-06-27 9:29 ` Benjamin Herrenschmidt [this message]
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