From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965161AbVKVTyX (ORCPT ); Tue, 22 Nov 2005 14:54:23 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S965162AbVKVTyW (ORCPT ); Tue, 22 Nov 2005 14:54:22 -0500 Received: from clock-tower.bc.nu ([81.2.110.250]:22211 "EHLO lxorguk.ukuu.org.uk") by vger.kernel.org with ESMTP id S965160AbVKVTyV (ORCPT ); Tue, 22 Nov 2005 14:54:21 -0500 Subject: Re: [PATCH, IDE] Blacklist CD-912E/ATK From: Alan Cox To: Horms Cc: Karol Lewandowski , 340228@bugs.debian.org, Bartlomiej Zolnierkiewicz , linux-kernel@vger.kernel.org, linux-ide@vger.kernel.org In-Reply-To: <20051122024426.8C16A34043@koto.vergenet.net> References: <20051122024426.8C16A34043@koto.vergenet.net> Content-Type: text/plain Content-Transfer-Encoding: 7bit Date: Tue, 22 Nov 2005 20:26:19 +0000 Message-Id: <1132691179.20233.77.camel@localhost.localdomain> Mime-Version: 1.0 X-Mailer: Evolution 2.2.3 (2.2.3-2.fc4) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org > The drive is clearly broken. Adding blacklist to drivers/ide/ide-dma.c > for this model ("CD-912E/ATK") fixes this problem. That may be the case but knowing if th drive is the problem is more tricky. Firstly try it on a different controller Secondly check for other firmware revisions Thirdly blacklist only your firmware rev if there are others > hdc: DMA disabled > ------------[ cut here ]------------ > kernel BUG at drivers/ide/ide-iops.c:949! > invalid operand: 0000 [#1] That is an IDE layer bug not a drive incompatibility. It may be one triggered the other but until the BUG the kernel was correctly behaving and had just turned off DMA anyway.