Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758136Ab0BMWrF (ORCPT ); Sat, 13 Feb 2010 17:47:05 -0500 Received: from mail-yw0-f179.google.com ([209.85.211.179]:57065 "EHLO mail-yw0-f179.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757093Ab0BMWrB (ORCPT ); Sat, 13 Feb 2010 17:47:01 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=sender:message-id:date:from:user-agent:mime-version:to:cc:subject :references:in-reply-to:content-type:content-transfer-encoding; b=F3PRhUHiBlXparo6zkE8UhoXHfKVSxGFZ21esWBxtcCU6t3q6w7UkxgHdOZ4fgChvk +QO2sQ15WeysDehOy4Sbm+OS3AZlrHI8YIqbRyDXwXc9od2h+kWvCKKOmwYxW8lANFib 8+1/2ECqKVPinFElv9IoChFSUDW0ryD5+ulEs= Message-ID: <4B772BE2.30108@garzik.org> Date: Sat, 13 Feb 2010 17:46:58 -0500 From: Jeff Garzik User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.7) Gecko/20100120 Fedora/3.0.1-1.fc11 Thunderbird/3.0.1 MIME-Version: 1.0 To: Robert Hancock CC: linux-kernel , ide , Mike Cui , Peer Chen , Allen Martin Subject: Re: [PATCH] ahci: disable FPDMA auto-activate optimization on NVIDIA AHCI References: <4B5FC213.1060601@gmail.com> In-Reply-To: <4B5FC213.1060601@gmail.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1172 Lines: 30 On 01/26/2010 11:33 PM, Robert Hancock wrote: > Mike Cui reported that his system with an NVIDIA MCP79 (aka MCP7A) chipset > stopped working with 2.6.32. The problem appears to be that 2.6.32 now enables > the FPDMA auto-activate optimization in the ahci driver. The drive works fine > with this enabled on an Intel AHCI so this appears to be a chipset bug. > Since MCP79 is a fairly recent NVIDIA chipset and we don't have any info on > whether any other NVIDIA chipsets have this issue, disable FPDMA AA optimization > on all NVIDIA AHCI controllers for now. > > Should address http://bugzilla.kernel.org/show_bug.cgi?id=14922 > > Signed-off-by: Robert Hancock > > --- > > Mike, can you test this out and make sure this resolves the problem for you? Sigh... we never did hear back from Mike or NVIDIA on this one, did we? I've been watching for a response, and haven't seen one to date. Jeff -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/