Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261893AbVE0GVI (ORCPT ); Fri, 27 May 2005 02:21:08 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261892AbVE0GVI (ORCPT ); Fri, 27 May 2005 02:21:08 -0400 Received: from brick.kernel.dk ([62.242.22.158]:51845 "EHLO nelson.home.kernel.dk") by vger.kernel.org with ESMTP id S261824AbVE0GU6 (ORCPT ); Fri, 27 May 2005 02:20:58 -0400 Date: Fri, 27 May 2005 08:21:55 +0200 From: Jens Axboe To: Meelis Roos Cc: Linux Kernel list , Linus Torvalds Subject: Re: ide-cd problem in 2.6.12-rc5 + todays snapshot Message-ID: <20050527062155.GG1435@suse.de> References: <20050526171425.GX1419@suse.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20050526171425.GX1419@suse.de> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1505 Lines: 36 On Thu, May 26 2005, Jens Axboe wrote: > On Thu, May 26 2005, Meelis Roos wrote: > > Background: I have a Sony CDU5211 CD drive with Intel D815EEA2 mainboard > > (ICH2 IDE in 815 chipset). Since 2.4.21 timeframe IDE DMA for this CD > > drive is broken (see my post > > http://www.ussg.iu.edu/hypermail/linux/kernel/0410.3/0480.html). This > > happens on at least 2 identical machines. This is the first problem > > (that I have learned to live with). > > > > Now, since ide-cd dma is broken, the first access to cd always gets DMA > > timeout and turns off DMA, then it works. I have hddtemp installed and > > it probes for drives on boot. In 2.6.12 (and I think I tested pristine > > 2.6.12-rc5 too) the cd works as before - dma timeout+disable on first > > access (by hddtemp). > > > > Now, in 2.6.12-rc5 + todays git snapshot, it does not work any more. I > > suspect the DMA alignment change. > > It must be, thanks for reporting this so quickly. Linus, can you exclude > that patch again? Rather miserably slow burning for some, than broken > hardware for others. > > Seems we do need finer granularity setting of alignment/length > restrictions. BTW Meelis, any chance you can change that 3 into a 15 for testing purposes? -- Jens Axboe - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/