From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alan Cox Subject: Re: [PATCH] ata: Add Intel SCH PATA support Date: Sun, 27 Apr 2008 15:31:11 +0100 Message-ID: <20080427153111.3438dce8@core> References: <20080426140007.63cfeede@dxy.sh.intel.com> <20080426103012.21dcf0fb@core> <20080427075115.3ea40204@dxy.sh.intel.com> <20080427093434.182a2137@core> <20080427220315.794a6df3@dxy.sh.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Return-path: Received: from outpipe-village-512-1.bc.nu ([81.2.110.250]:58523 "EHLO lxorguk.ukuu.org.uk" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1752574AbYD0Oi0 (ORCPT ); Sun, 27 Apr 2008 10:38:26 -0400 In-Reply-To: <20080427220315.794a6df3@dxy.sh.intel.com> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Alek Du Cc: linux-ide@vger.kernel.org, jgarzik@pobox.com On Sun, 27 Apr 2008 22:03:15 +0800 Alek Du wrote: > Alan, > > One problem I still do not understand, if I return PATA_UNK for cable detection result, could the > driver finally set the disk to UDMA5 mode if I plug in 80 wire disk? You tell me - you've got the hardware documentation I assume. Assuming the system implements detection then it should. If a PATA controller doesn't implement any detection (cable or host side) and it does UDMA5 then I believe the correct description for it is usually "broken" as people will have horrible problems trying to use things like flash drives with it. Alan