From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1764197AbYEATQz (ORCPT ); Thu, 1 May 2008 15:16:55 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1760726AbYEATQq (ORCPT ); Thu, 1 May 2008 15:16:46 -0400 Received: from outpipe-village-512-1.bc.nu ([81.2.110.250]:42682 "EHLO lxorguk.ukuu.org.uk" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1760037AbYEATQp (ORCPT ); Thu, 1 May 2008 15:16:45 -0400 Date: Thu, 1 May 2008 20:08:51 +0100 From: Alan Cox To: Martin =?UTF-8?B?TU9LUkVKxaA=?= Cc: LKML Subject: Re: 2.6.23.17 & 2.6.24.5 and maybe earlier: pata_marvell: need to disable DMA to get rid of '(ATA bus error)', 'ata7.00: status: { DRDY ERR }', 'ata7.00: error: { ICRC ABRT }' Message-ID: <20080501200851.2e14d3b8@core> In-Reply-To: <4819FDAF.7050005@ribosome.natur.cuni.cz> References: <4819FDAF.7050005@ribosome.natur.cuni.cz> X-Mailer: Claws Mail 3.3.1 (GTK+ 2.12.5; x86_64-redhat-linux-gnu) Organization: Red Hat UK Cyf., Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SL4 1TE, Y Deyrnas Gyfunol. Cofrestrwyd yng Nghymru a Lloegr o'r rhif cofrestru 3798903 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 > To get rid of the errors, I can use libata.dma=0 kernel > command-line parameter. Unfortunately, this sets all libata > devices to PIO4 mode. How can I set just this one? I tried > 'libata.force=7.00:pio4' but it did not help. libata.dma=3 will stop DMA being used for CF devices (except those that decide to pretend to be ATA classes). This one comes up a lot as many CF adapters are simply not adequate for UDMA. > Where are the flags documented? linux/Documentation/ directory > contains almost nothing about pata_marvell. :( The flags are all common across drivers. Alan