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Date:	Mon, 10 Sep 2007 19:44:32 -0600
From:	Robert Hancock <hancockr@...w.ca>
To:	Chuck Ebbert <cebbert@...hat.com>
Cc:	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Karl Bellve <Karl.Bellve@...ssmed.edu>,
	linux-kernel@...r.kernel.org
Subject: Re: PCI: Unable to reserve mem region problem

Chuck Ebbert wrote:
> On 09/05/2007 08:31 PM, Alan Cox wrote:
>> On Wed, 05 Sep 2007 10:32:38 -0400
>> "Karl Bellve" <Karl.Bellve@...ssmed.edu> wrote:
>>
>>> Please CC any response. Thanks.
>>>
>>> I am having an issue with a Supermicro h8dce motherboard and failure to 
>>> recognize a 5th SATA drive after upgrading to Fedora 7.
>> Can you send me an lspci -vvxxx so that I can look into this. Might be a
>> few days with the kernel summit but it should give a clue and may be
>> linked to ADMA mode
> 
> It's in RH bugzilla:
> 
> https://bugzilla.redhat.com/show_bug.cgi?id=280641

The last BAR on the nForce4 ADMA controllers on this board are at 
0xdfefe000 and 0xdfefd000. But it looks like PnP ACPI is also reserving 
those memory ranges:

Aug 30 14:08:02 alcor kernel: pnp: 00:09: iomem range 
0xdfefd000-0xdfefd3ff has been reserved
Aug 30 14:08:02 alcor kernel: pnp: 00:09: iomem range 
0xdfefe000-0xdfefe3ff has been reserved

Which I very much doubt it should be doing, the BIOS doesn't need to 
reserve PCI BAR ranges in the ACPI tables. This sounds like a BIOS bug. 
You might want to check for an update from Supermicro.

-- 
Robert Hancock      Saskatoon, SK, Canada
To email, remove "nospam" from hancockr@...pamshaw.ca
Home Page: http://www.roberthancock.com/

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