From mboxrd@z Thu Jan  1 00:00:00 1970
From: Daniel Drake <dsd@gentoo.org>
Subject: Re: sata_via issue for VIA Epia SP8000 in 2.6.18[.1]?
Date: Mon, 23 Oct 2006 20:04:00 -0400
Message-ID: <453D5870.20308@gentoo.org>
References: <453B61D9.9060707@xs4all.nl>
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To: Udo van den Heuvel <udovdh@xs4all.nl>
Cc: linux-kernel@vger.kernel.org, linux-ide@vger.kernel.org

Udo van den Heuvel wrote:
> Hello,
> 
> 2.6.17.13 works OK on this VIA Epia SP8000.
> (remember vaguely about some (PCI?) fixups to get things going)
> Now I try to get 2.6.18.1 working. SATA is detected by this kernel but
> disk gives timeout while 2.6.17.13 boots fine.
> 
> Some burbs:
> 
> Links is up but  SStatus 113 SControl 300
> qc timeout (cmd 0xec)
> failed to IDENTIFY
> This results in a kernel panic.

Try this patch:
http://marc.theaimsgroup.com/?l=git-commits-head&m=116121959622812&q=raw

If that doesn't help, I guess you're seeing the same as 
https://bugs.gentoo.org/150773

Daniel