From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030328AbVIVNZs (ORCPT ); Thu, 22 Sep 2005 09:25:48 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1030315AbVIVNZs (ORCPT ); Thu, 22 Sep 2005 09:25:48 -0400 Received: from perpugilliam.csclub.uwaterloo.ca ([129.97.134.31]:61880 "EHLO perpugilliam.csclub.uwaterloo.ca") by vger.kernel.org with ESMTP id S1030313AbVIVNZr (ORCPT ); Thu, 22 Sep 2005 09:25:47 -0400 Date: Thu, 22 Sep 2005 09:25:46 -0400 To: David R Cc: linux-kernel@vger.kernel.org Subject: Re: DMA broken in mainline 2.6.13.2 _AND_ opensuse vendor 2.6.13-15 Message-ID: <20050922132546.GK28578@csclub.uwaterloo.ca> References: <433216C2.4020707@industrialstrengthsolutions.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <433216C2.4020707@industrialstrengthsolutions.com> User-Agent: Mutt/1.5.9i From: lsorense@csclub.uwaterloo.ca (Lennart Sorensen) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Sep 21, 2005 at 10:28:18PM -0400, David R wrote: > DMA is broken in 2.6.13.2 and opensuse 2.6.13-15, for my cdrom/dvd > burner. > > My chipset is: > > 00:0f.1 IDE interface: VIA Technologies, Inc. > VT82C586A/B/VT82C686/A/B/VT823x/A/C/VT8235 PIPC Bus Master IDE (rev 06) > > I have also heard ICH5 has this problem as well. > > I can tell you that hdparm -iI /dev/hdb reports the drive in udma4 mode. > > This drive is a: LITE-ON DVDRW SOHW-1693S, FwRev=KS09 However I think > that maybe irrelevant. > > On .13 I get this at the end of dmesg: > > hdb: drive_cmd: status=0x51 { DriveReady SeekComplete Error } > hdb: drive_cmd: error=0x04 { AbortedCommand } > ide: failed opcode was: 0xec > hdb: drive_cmd: status=0x51 { DriveReady SeekComplete Error } > hdb: drive_cmd: error=0x04 { AbortedCommand } > ide: failed opcode was: 0xec > > On .12 I get this but not on .13: > > VP_IDE: VIA vt8237 (rev 00) IDE UDMA133 controller on pci0000:00:0f.1 > ide0: BM-DMA at 0xa000-0xa007, BIOS settings: hda:pio, hdb:DMA > ide1: BM-DMA at 0xa008-0xa00f, BIOS settings: hdc:pio, hdd:pio What is on hda? If nothing, fix your system. You should NOT have a slave without a master on an ide bus. Probably won't fix things, but sometimes it does fix things. Len Sorensen