From: Jeff Garzik <jeff@garzik.org>
To: Robert Hancock <hancockrwd@gmail.com>
Cc: linux-kernel <linux-kernel@vger.kernel.org>,
ide <linux-ide@vger.kernel.org>, Mike Cui <cuicui@gmail.com>,
Peer Chen <pchen@nvidia.com>
Subject: Re: [PATCH] ahci: disable FPDMA auto-activate optimization on NVIDIA AHCI
Date: Wed, 24 Feb 2010 22:45:43 -0500 [thread overview]
Message-ID: <4B85F267.8090907@garzik.org> (raw)
In-Reply-To: <4B5FC213.1060601@gmail.com>
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<hancockrwd@gmail.com>
>
> ---
>
> Mike, can you test this out and make sure this resolves the problem for you?
applied
prev parent reply other threads:[~2010-02-25 3:45 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-01-27 4:33 [PATCH] ahci: disable FPDMA auto-activate optimization on NVIDIA AHCI Robert Hancock
2010-01-31 17:10 ` Robert Hancock
2010-02-13 22:46 ` Jeff Garzik
2010-02-13 22:53 ` Robert Hancock
2010-02-13 23:02 ` Jeff Garzik
2010-02-15 18:34 ` Robert Hancock
2010-02-16 22:46 ` Prajakta Gudadhe
2010-02-24 0:39 ` Robert Hancock
2010-02-25 3:45 ` Jeff Garzik [this message]
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