From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S266165AbUA2CZU (ORCPT ); Wed, 28 Jan 2004 21:25:20 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S266166AbUA2CZU (ORCPT ); Wed, 28 Jan 2004 21:25:20 -0500 Received: from user-119ahgg.biz.mindspring.com ([66.149.70.16]:52409 "EHLO mail.home") by vger.kernel.org with ESMTP id S266165AbUA2CZQ (ORCPT ); Wed, 28 Jan 2004 21:25:16 -0500 From: Eric To: Greg Stark , linux-kernel@vger.kernel.org Subject: Re: Can't enable DMA on my DVD in 2.6.1? Date: Wed, 28 Jan 2004 20:24:19 -0600 User-Agent: KMail/1.5.94 References: <873cae17pi.fsf@stark.xeocode.com> In-Reply-To: <873cae17pi.fsf@stark.xeocode.com> MIME-Version: 1.0 Content-Disposition: inline Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Message-Id: <200401282024.19658.eric@cisu.net> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org > /dev/hdd: > setting using_dma to 1 (on) > HDIO_SET_DMA failed: Operation not permitted > using_dma = 0 (off) > -EPERM is usually caused by not having your chipset compiled into the kernel or the chipset driver not supporting DMA. If the first is the case, try compiling in one or more chipsets you suspect are yours in Device Drivers->Char->(ALI Chipset support, ATI Chipset support etc.) and Device Drivers->ATA/ATAPI->(ALI Chipset support, AMD Chipset support) etc. etc. Find your chipsets and compile them into the kernel. If its the second case I have no idea if a particular driver isnt supporting DMA. AFAIK they all should. Thats a question for that particular chipset maintainer. However your problem is most certainly the first. It escapes me which device section will solve your problem (CHAR or ATA/ATAPI) but try both, it won't hurt to have some un-used code in the kernel. You can always remove un-needed drivers when you pinpoint the driver you need. ------------------------- Eric Bambach Eric at cisu dot net -------------------------