From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Sun, 21 Jan 2001 08:05:01 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Sun, 21 Jan 2001 08:04:52 -0500 Received: from app79.hitnet.RWTH-Aachen.DE ([137.226.181.79]:38920 "EHLO anduin.gondor.com") by vger.kernel.org with ESMTP id ; Sun, 21 Jan 2001 08:04:39 -0500 Date: Sun, 21 Jan 2001 14:04:33 +0100 From: Jan Niehusmann To: Vojtech Pavlik Cc: Andre Hedrick , Alan Chandler , linux-kernel@vger.kernel.org Subject: Re: [preview] Latest AMD & VIA IDE drivers with UDMA100 support Message-ID: <20010121140433.A1068@gondor.com> In-Reply-To: <20010120215641.A1818@suse.cz> <20010121104606.A398@suse.cz> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: <20010121104606.A398@suse.cz>; from vojtech@suse.cz on Sun, Jan 21, 2001 at 10:46:06AM +0100 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Sun, Jan 21, 2001 at 10:46:06AM +0100, Vojtech Pavlik wrote: > Ok, the VIA driver from clean 2.2.18 does nothing. It doesn't even use > hardcoded timings. It doesn't touch any timing tables. It just blindly > enables prefetch and writeback in the chips. The thing works because it > relies on BIOS to set things up correctly, and this is often the case, > yes. If BIOS is often correct: Is it possible to read these values and compare them to the values linux calculates? If both match: OK, continue. If they are different: Either BIOS or linux is wrong, print a warning and disable DMA (or go to some other kind of 'safe mode'). Just an idea, I don't know anything about chipsets and IDE timings ;-) Jan - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/