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Subject: Re: PCI IRQ problems -- update
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Jim Paris <jim@jtan.com>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
In-Reply-To: <20041211202314.GA22731@jim.sh>
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Date: Sun, 12 Dec 2004 11:29:46 +0000
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On Sad, 2004-12-11 at 20:23, Jim Paris wrote:
> The ICH3-M datasheet says offset 0x09 is the Programming Interface
> register.  Default value is 0x8A (legacy on both), value here is 0x8E
> (legacy on primary, native on secondary).  This mixed-mode setting
> is noted as a disallowed combination in the datasheet.
> 
> So it looks like my BIOS is screwing me.  Where could/should I fix
> this up?

A PCI quirk would be the obvious place, or in the ICH driver
(drivers/ide/pci/piix). You might want to print it early in boot and
make sure it was the BIOS not the kernel that did it.