From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sergei Shtylyov Subject: Re: 2.6.29-rc libata sff 32bit PIO regression Date: Wed, 04 Feb 2009 14:10:58 +0300 Message-ID: <498977C2.3020305@ru.mvista.com> References: <20090126191151.18b094e6@lxorguk.ukuu.org.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from gateway-1237.mvista.com ([63.81.120.155]:13458 "EHLO imap.sh.mvista.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1751341AbZBDLLI (ORCPT ); Wed, 4 Feb 2009 06:11:08 -0500 In-Reply-To: <20090126191151.18b094e6@lxorguk.ukuu.org.uk> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Alan Cox Cc: Hugh Dickins , Jeff Garzik , "Rafael J. Wysocki" , linux-ide@vger.kernel.org, linux-kernel@vger.kernel.org Hello. Alan Cox wrote: >> [PATCH] libata sff: 32bit PIO use 16bit on slop >> >> 871af1210f13966ab911ed2166e4ab2ce775b99d libata: Add 32bit PIO support >> causes errors on a four-year-old ata_piix Dell Precision 670. Using >> 16bit PIO instead of 32bit PIO on the odd 1, 2 or 3 chars fixes that. >> >> Signed-off-by: Hugh Dickins >> > > For the 3 bytes of slop it should use a single iowrite32 but otherwise > that seems ok. I'm not really sure what this would achieve but I can post a patch implementing this (based on my suggestion to Hugh). MBR, Sergei