linux-kernel - Re: [regression] 2.6.23 sata_mv EH updates broke my 7042 controller

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Message-ID: <470176B8.1000109@pobox.com>
Date:	Mon, 01 Oct 2007 18:37:44 -0400
From:	Jeff Garzik <jgarzik@...ox.com>
To:	Olof Johansson <olof@...om.net>
CC:	linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [regression] 2.6.23 sata_mv EH updates broke my 7042 controller

Olof Johansson wrote:
> Hi,
> 
> I just pulled out my Marvell 7042 SATA controller here to give it a spin
> and noticed that it no longer worked (i.e. init segvs when loading from
> it), etc. 2.6.22 is fine.
> 
> Bisecting (just the file drivers/ata/sata_mv.c) resulted in
> bdd4dddee325a7dce3e84cf48201a06aa8508aa4 popping out as the culprit
> (file version 4537deb5e90b717a725b3d74b58b4bb1d28443d0 is fine).
> 
> Just for sanity checking: Has anyone else used 7042/6042 with the current
> mainline driver?

The update was tested extensively on 6042.  I have a 7042, but haven't 
found a compatible PCI slot here.


> Hardware config in my case:
> Highpoint 2310 controller
> PPC (big endian)
> WD Raptor disk
> 
> Works fine with the other controller I've been using (SIL24), and works
> fine if I revert the driver.
> 
> It also works fine if I disable the IOMMU. This would point towards
> either a stale dma mapping, or a missing setup of one.
> 
> Not being much at home in the SATA drivers I could keep digging but I
> figured I'd bring it up first in case it rings a bell for someone.

The IOMMU data point is certainly interesting.  Nothing jumps out on a 
re-review of the patch, so keep digging and let us know ;-)

	Jeff


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