From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Miller <davem@davemloft.net>
Subject: Re: [PATCH] via82cxxx: fix typo for VT6415 PCIE PATA IDE Host
 Controller support.
Date: Mon, 06 Sep 2010 22:02:40 -0700 (PDT)
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From: Yann Dirson <ydirson@free.fr>
Date: Tue, 20 Jul 2010 00:07:37 +0200

> OTOH, we see here that the system believes in existence of "ide1",
> although the vt6415 appears to be single-channel
> (http://www.via.com.tw/en/products/peripherals/pci_pcie/vt6415/)

I think this is unlikely as the ATA layer pata_via.c driver also
does not mark this device as single-channel.

Have you tried just booting up with the ATA driver enabled instead
of the IDE layer one?  Please do that as it might help narrow this
down.