linux-kernel - Re: [PATCH 2/2] Revert "Revert "ide: try to use PIO Mode 0 during probe if possible""

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Message-Id: <20091006.155705.26059456.davem@davemloft.net>
Date:	Tue, 06 Oct 2009 15:57:05 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	bzolnier@...il.com
Cc:	torvalds@...ux-foundation.org, joao.ramos@...v.pt, david@...es.net,
	d.stussy@...oo.com, linux-ide@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] Revert "Revert "ide: try to use PIO Mode 0 during
 probe if possible""

From: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
Date: Wed, 7 Oct 2009 00:52:37 +0200

> On Wednesday 07 October 2009 00:41:20 David Miller wrote:
>> From: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
>> Date: Wed, 7 Oct 2009 00:27:45 +0200
>> 
>> > The root cause of reported system hangs was (now fixed) sis5513 bug
>> > and not "ide: try to use PIO Mode 0 during probe if possible" change
>> > (commit 6029336426a2b43e4bc6f4a84be8789a047d139e) so the revert was
>> > incorrect (it simply replaced one regression with the other one).
>> 
>> What is this older "regression" fixed by the PIO-0 change?
>> 
>> You're not explaining it and neither does the commit message for the
>> PIO-0 change.
> 
> It does:
> 
> | Subject: [PATCH] sis5513: fix PIO setup for ATAPI devices

Sorry, I wasn't clear.

I'm talking about commit 6029336426a2b43e4bc6f4a84be8789a047d139e, it
doesn't say why we want to try PIO 0 mode during probe.

What was the regression fixed by that change?

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