linux-kernel - Re: [PATCH 02/20] ata_piix: unify code for programming PIO and MWDMA timings

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Date:	Sun, 20 Feb 2011 21:07:31 +0000
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Sergei Shtylyov <sshtylyov@...sta.com>
Cc:	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>,
	linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 02/20] ata_piix: unify code for programming PIO and
 MWDMA timings

>     PIO mode is setup by different code, and it takes care of the IORDY 
> setting according to the PIO rules (and it gets called). DMA mode setup should 
> just ignore the IORDY setting as in all other sane drivers.


Well it can't ignore it - but if you mean just keep the bit as is then
that sounds sensible, have to see what the docs say happens if you ever
set MWDMA without IORDY.

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