On Sun, 2006-12-10 at 17:00 +0100, Adrian Bunk wrote:
> +DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_VIA, PCI_ANY_ID,
> quirk_via_irq);

This is back to state of kernel 2.6.16 final (without .x)

In kernel 2.6.17 final we got
(http://lkml.org/lkml/2006/4/19/16)
commit 75cf7456dd87335f574dcd53c4ae616a2ad71a11 
Author: Chris Wedgwood <cw@f00f.org>
Date:   Tue Apr 18 23:57:09 2006 -0700 
    Signed-off-by: Chris Wedgwood <cw@f00f.org>
    Acked-by: Jeff Garzik <jeff@garzik.org>
    Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
and 
commit a7b862f663d81858531dfccc0537bc9d8a2a4121
Author: Chris Wedgwood <cw@f00f.org>
Date:   Mon May 15 09:43:55 2006 -0700
    [PATCH] VIA quirk fixup, additional PCI IDs    

BUT the latest stable and tested patch is the commit 09d6029f43ebbe7307854abdae204c25d711ff94
PCI: VIA IRQ quirk behaviour change, which in my opinion that should go in.

Thanks,
-- 
Sérgio M.B.