From mboxrd@z Thu Jan  1 00:00:00 1970
From: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Subject: Re: libata and DMA quirks
Date: Fri, 27 Jun 2008 12:37:29 +0400
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To: benh@kernel.crashing.org
Cc: linux-ide@vger.kernel.org, Jeff Garzik <jgarzik@pobox.com>, Tejun Heo <htejun@gmail.com>

Hello.

Benjamin Herrenschmidt wrote:
> The main one is that one their latest cell, they do the following
> "workarounds" which I never implemented in drivers/ide/ppc/pmac.c but
> I'd like to implement in the libata driver, unless you believe that i=
s
> unnecessary:
>
> a) =EF=BB=BFFor any ATAPI DMA, If the transfer size is not a multiple=
 of 16
> bytes, switch to PIO for this command.
>  =20

   No need to do this in old driver anyway since the *IDE* core only=20
uses DMA for block commands like READ and WRITE.
Not sure about libata.

WBR, Sergei