linux-kernel - Re: [PATCH 2/2] PNP: work around Dell 1536/1546 BIOS MMCONFIG bug that breaks USB

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Date:	Fri, 6 Jan 2012 10:18:49 -0700
From:	Bjorn Helgaas <bhelgaas@...gle.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, thuban@...gularity.fr,
	dann frazier <dann.frazier@...onical.com>,
	Lisa Salimbas <lisa.salimbas@...onical.com>,
	linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org,
	Len Brown <lenb@...nel.org>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	linux-pci@...r.kernel.org
Subject: Re: [PATCH 2/2] PNP: work around Dell 1536/1546 BIOS MMCONFIG bug
 that breaks USB

On Fri, Jan 6, 2012 at 1:49 AM, Ingo Molnar <mingo@...e.hu> wrote:
>
> * Bjorn Helgaas <bhelgaas@...gle.com> wrote:
>
>> On Thu, Jan 5, 2012 at 2:27 PM, Bjorn Helgaas <bhelgaas@...gle.com> wrote:
>> > Some Dell BIOSes have MCFG tables that don't report the entire
>> > MMCONFIG area claimed by the chipset.  If we move PCI devices into
>> > that claimed-but-unreported area, they don't work.
>> >
>> > This quirk reads the AMD MMCONFIG MSRs and adds PNP0C01 resources as
>> > needed to cover the entire area.
>>
>> PNP stuff usually goes through Len's ACPI tree, but this is
>> really x86-specific, and these two patches need to go
>> together, so I think it would make sense to put them both in
>> the x86 tree.  Len, do you object?
>
> I'd really suggest the PCI tree for this - mmconfig is really
> PCI related.

OK, Jesse, would you like to pick up these two patches?

Bjorn
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