From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261386AbULIAeD (ORCPT ); Wed, 8 Dec 2004 19:34:03 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261391AbULIAeC (ORCPT ); Wed, 8 Dec 2004 19:34:02 -0500 Received: from fed1rmmtao04.cox.net ([68.230.241.35]:11502 "EHLO fed1rmmtao04.cox.net") by vger.kernel.org with ESMTP id S261386AbULIAd6 (ORCPT ); Wed, 8 Dec 2004 19:33:58 -0500 To: linux-kernel@vger.kernel.org, "Alexander E. Patrakov" In-Reply-To: Subject: CD-ROM ide-dma blacklist amnesty drive From: Junio C Hamano Date: Wed, 08 Dec 2004 16:33:56 -0800 Message-ID: <7v7jns2tu3.fsf@assigned-by-dhcp.cox.net> User-Agent: Gnus/5.1007 (Gnus v5.10.7) Emacs/21.3 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Alexander E. Patrakov wrote: >The "SAMSUNG CD-ROM SC-148F" drive is listed in drive_blacklist in >ide-dma.c. However, this drive worked well with DMA enabled with earlier >kernel versions (<=2.6.8.1) where the "via82cxxx" driver did not look at >this blacklist. So the question: what was the reason for blacklisting this >(apparently working) drive? Is it still valid? This was discussed about two months ago without a firm resolution as far as I can tell, in this thread: http://thread.gmane.org/gmane.linux.kernel/241862 Especially from Jens and Alan: http://article.gmane.org/gmane.linux.kernel/242226 http://article.gmane.org/gmane.linux.kernel/242228 I've been meaning to start a "CD-ROM ide-dma blacklist amnesty drive" ;-) The intent is to gather comments from owners of blacklisted drives to see if those models still deserve to be on the blacklist. As for myself, I would vote for removing "PLEXTOR CD-R PX-W8432T" (at least firmware "1.09") from the list. This model seems to work fine with DMA. As Alexander does, I have been running it on VIA motherboard which only recently started looking at the ide-dma blacklist without trouble; that is, before via82cxxx started caring. The following is a list of CD drives blacklisted (I've removed hard-disks and flash from the list) in drivers/ide/ide-dma.c as of 2.6.10-rc3: Compaq CRD-8241B CRD-8400B CRD-8480B CRD-8480C CRD-8482B CRD-84 SANYO CD-ROM CRD HITACHI CDR-8 HITACHI CDR-8335 HITACHI CDR-8435 Toshiba CD-ROM XM-6202B CD-532E-A E-IDE CD-ROM CR-840 CD-ROM Drive/F5A WPI CDD-820 SAMSUNG CD-ROM SC-148C SAMSUNG CD-ROM SC-148F SAMSUNG CD-ROM SC SAMSUNG CD-ROM SN-124 PLEXTOR CD-R PX-W8432T ATAPI CD-ROM DRIVE 40X MAXIMUM _NEC DV5800A If (1) you are a owner of one of the listed drives, and (2) you know your drive works fine with DMA, please speak up. It would especially be a big plus if your drive is on via82cxxx and did not have any trouble running it with DMA before 2.6.8. Thanks.