From: Alex Chiang <achiang@hp.com>
Date: Thu, 23 Jul 2009 23:03:05 +0000 (-0600)
Subject: PCI Hotplug: acpiphp: get pci_bus from acpi handle correctly
X-Git-Tag: v2.6.32-rc1~670^2~68
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5228a828ee044834d78abdf25306bf46b19dcc4d;p=pandora-kernel.git

PCI Hotplug: acpiphp: get pci_bus from acpi handle correctly

We cannot simply call acpi_get_pci_dev() on any random ACPI handle
and hope that it works, because a PCI root bridge may not have
an associated struct pci_dev.

This is allowed per the PCI specification, and is referred to as a
non-materialized bridge.

So, depending on the type of PCI bridge that the handle points to,
use the appropriate interface to return the struct pci_bus correctly.

Reviewed-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Alex Chiang <achiang@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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