From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeff Garzik Subject: Re: [PATCH 16/86] pata_efar: MWDMA0 is unsupported Date: Thu, 03 Dec 2009 15:50:14 -0500 Message-ID: <4B182486.6050505@garzik.org> References: <20091125170218.5446.13513.sendpatchset@localhost> <20091125170415.5446.15073.sendpatchset@localhost> <20091125172552.6817e3da@lxorguk.ukuu.org.uk> <200911261553.58941.bzolnier@gmail.com> <20091126151546.6c891014@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 mail-yx0-f187.google.com ([209.85.210.187]:62744 "EHLO mail-yx0-f187.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753631AbZLCUuJ (ORCPT ); Thu, 3 Dec 2009 15:50:09 -0500 In-Reply-To: <20091126151546.6c891014@lxorguk.ukuu.org.uk> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Alan Cox Cc: Bartlomiej Zolnierkiewicz , linux-ide@vger.kernel.org, linux-kernel@vger.kernel.org On 11/26/2009 10:15 AM, Alan Cox wrote: > On Thu, 26 Nov 2009 15:53:58 +0100 > Bartlomiej Zolnierkiewicz wrote: > >> On Wednesday 25 November 2009 06:25:52 pm Alan Cox wrote: >>> On Wed, 25 Nov 2009 18:04:15 +0100 >>> Bartlomiej Zolnierkiewicz wrote: >>> >>>> From: Bartlomiej Zolnierkiewicz >>>> Subject: [PATCH] pata_efar: MWDMA0 is unsupported >>>> >>>> MWDMA0 timings cannot be met with the PIIX based controller >>>> programming interface. >>> >>> The efar documentation makes no reference to not being capable of MWDMA0, >>> so where does this come from ? No MWDMA0 is an Intel erratum it appears. >> >> No MWDMA0 support is a common issue on all 'PIIX-like' controllers. >> >> In case of this chipset while the (preliminary) documentation claims MWDMA0 >> support on the 'FEATURES' page the later 'programming guide' part describes >> only PIO0-4, SWDMA2, MWDMA1-2 and UDMA0-4 transfer modes as supported. > > Cool - I only have the original docs. ACK Bart's patch, then? This thread was a bit unclear, and I want to be certain (well, as certain as we can be :)) Jeff