From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752931AbZHKTLA (ORCPT ); Tue, 11 Aug 2009 15:11:00 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751009AbZHKTLA (ORCPT ); Tue, 11 Aug 2009 15:11:00 -0400 Received: from earthlight.etchedpixels.co.uk ([81.2.110.250]:47052 "EHLO www.etchedpixels.co.uk" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1750844AbZHKTK7 (ORCPT ); Tue, 11 Aug 2009 15:10:59 -0400 Date: Tue, 11 Aug 2009 20:12:06 +0100 From: Alan Cox To: Ben Greear Cc: linux-kernel Subject: Re: How to disable DMA for compact-flash disk? Message-ID: <20090811201206.14556624@lxorguk.ukuu.org.uk> In-Reply-To: <4A81BDA6.4080804@candelatech.com> References: <4A81BDA6.4080804@candelatech.com> X-Mailer: Claws Mail 3.7.1 (GTK+ 2.14.7; x86_64-redhat-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 11 Aug 2009 11:51:18 -0700 Ben Greear wrote: > I'm trying to use Fedora 11 with default kernel on an old via system > that boots from compact flash. DMA is not supported on the CF for > whatever reason, and in previous kernels, I've always disabled > DMA, first with ide=nodma, and then later with > ide_core.nodma=0.0 ide_core.nodma=0.1 ... Fedora switched to libata some releases ago so libata.dma=n 0 - off 1 - disk only + 2 disk/CD + 4 disk/CD/CFA (so you can turn DMA off just for CFA devices providing they admit they are CFA)