From: Taku Izumi <izumi.taku@jp.fujitsu.com>
Date: Tue, 18 Sep 2012 06:23:23 +0000 (+0900)
Subject: PCI/ACPI: Use acpi_driver_data() rather than searching acpi_pci_roots
X-Git-Tag: omap-for-v3.7-rc1/fixes-cpufreq-signed~79^2~2^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cd4faf9c34b27cbb6bcc70a4f1d1759f2e6fa7fd;p=pandora-kernel.git

PCI/ACPI: Use acpi_driver_data() rather than searching acpi_pci_roots

This patch changes the implementation of acpi_pci_find_root().

We can access acpi_pci_root without scanning acpi_pci_roots list.
If hostbridge hotplug is supported, acpi_pci_roots list will be
protected by mutex.  We should not access acpi_pci_roots list
if preventable to lessen deadlock risk.

Signed-off-by: Taku Izumi <izumi.taku@jp.fujitsu.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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