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SubjectRe: [PATCH][Regression fix] PCI / Hotplug: Always allow acpiphp to handle non-PCIe bridges
On Tue, 13 Dec 2011 00:02:28 +0100
"Rafael J. Wysocki" <rjw@sisk.pl> wrote:

> From: Rafael J. Wysocki <rjw@sisk.pl>
>
> Commit 0d52f54e2ef64c189dedc332e680b2eb4a34590a (PCI / ACPI: Make
> acpiphp ignore root bridges using PCIe native hotplug) added code
> that made the acpiphp driver completely ignore PCIe root complexes
> for which the kernel had been granted control of the native PCIe
> hotplug feature by the BIOS through _OSC. Unfortunately, however,
> this was a mistake, because on some systems there were PCI bridges
> supporting PCI (non-PCIe) hotplug under such root complexes and
> those bridges should have been handled by acpiphp.
>
> For this reason, revert the changes made by the commit mentioned
> above and make register_slot() in drivers/pci/hotplug/acpiphp_glue.c
> avoid registering hotplug slots for PCIe ports that belong to
> root complexes with native PCIe hotplug enabled (which means that
> the BIOS has granted the kernel control of this feature for the
> given root complex). This is reported to address the original
> issue fixed by commit 0d52f54e2ef64c189dedc332e680b2eb4a34590a and
> to work on the system where that commit broke things.
>
> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
> ---

Applied to my for-linus branch. I'll probably send to Linus on Thu. or
so.

I also rebased the breakage out of linux-next.

Thanks,
--
Jesse Barnes, Intel Open Source Technology Center
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