From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964771AbWIIPhX (ORCPT ); Sat, 9 Sep 2006 11:37:23 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932272AbWIIPhX (ORCPT ); Sat, 9 Sep 2006 11:37:23 -0400 Received: from outmx021.isp.belgacom.be ([195.238.4.202]:61607 "EHLO outmx021.isp.belgacom.be") by vger.kernel.org with ESMTP id S932273AbWIIPhU (ORCPT ); Sat, 9 Sep 2006 11:37:20 -0400 Subject: [PATCH] alim15x3.c: M5229 (rev c8) support for DMA cd-writer From: Michael De Backer To: linux-kernel@vger.kernel.org Cc: trivial@kernel.org, akpm@osdl.org Content-Type: text/plain Date: Sat, 09 Sep 2006 17:37:01 +0200 Message-Id: <1157816221.5998.51.camel@mws.local.net> Mime-Version: 1.0 X-Mailer: Evolution 2.6.3 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org From: Michael De Backer Configuration bits are not set properly for DMA on some chipset revisions. It has already been corrected for M5229 (rev c7) but not for M5229 (rev c8). This leads to the bug described at http://bugzilla.kernel.org/show_bug.cgi?id=5786 (lost interrupt + ide bus hangs). Signed-off-by: Michael De Backer --- This has been tested on ASUS A8R32-MVP motherboard (M5229 c8) with 2.6.18-rc6, 2.6.18-rc6-mm1, 2.6.18-rc5-mm1, 2.6.17.10 and two different cd-writers. It completely solves the problem. The following patch is against the 2.6.18-rc6 or 2.6.18-rc6-mm1 kernel: --- linux/drivers/ide/pci/alim15x3.c.orig 2006-09-09 16:07:07.000000000 +0200 +++ linux/drivers/ide/pci/alim15x3.c 2006-09-09 16:08:25.000000000 +0200 @@ -730,7 +730,7 @@ static unsigned int __devinit ata66_ali1 if(m5229_revision <= 0x20) tmpbyte = (tmpbyte & (~0x02)) | 0x01; - else if (m5229_revision == 0xc7) + else if (m5229_revision == 0xc7 || 0xc8) tmpbyte |= 0x03; else tmpbyte |= 0x01;