From mboxrd@z Thu Jan 1 00:00:00 1970 From: Pat LaVarre Subject: Re: [PATCH] libata-core when not ata_id_use_dmadir despite yesSili conI mage Date: 15 May 2004 10:46:28 -0600 Sender: linux-ide-owner@vger.kernel.org Message-ID: <1084639588.3070.9.camel@patibmrh9> References: <1084630807.5082.42.camel@patibmrh9><200405151633.10473.bzolnie r@elka.pw.edu.pl> <40A64229.7000600@pobox.com><200405151838.15898.bzolnier@ elka.pw.edu.pl> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Return-path: Received: from email-out2.iomega.com ([147.178.1.83]:39918 "EHLO email.iomega.com") by vger.kernel.org with ESMTP id S264702AbUEOQqt (ORCPT ); Sat, 15 May 2004 12:46:49 -0400 In-Reply-To: <200405151838.15898.bzolnier@elka.pw.edu.pl> List-Id: linux-ide@vger.kernel.org To: Jeff Garzik Cc: linux-ide@vger.kernel.org, Bartlomiej Zolnierkiewicz > > We can do so for our development here, but a better solution based on > > released parts will need to be found... > > Do you know of some way to detect SI 3611CT80 1.4? I don't. Jeff G, do you? > > And this language makes sense, since it is unknown what all those cheap > > old ATAPI devices will do. It's too risky to simply set this bit for > > all ATAPI devices, without lots of testing. > > OK Yes. > > According to ATA/ATAPI7, > > > > A device that does not support the DMADIR feature may abort a > > command if the DMADIR bit is set to 1. I believe this is a t13.org change that is NOT backwards-compatible, analogous to the theft I remember of op xEC Identify "word" 128. I will double-check ATA/ATAPI 4/ 5/ 6 and report the relevant language here. Pat LaVarre