PCI hotplug: fix wrong assumption in acpi_get_hp_hw_control_from_firmware
authorKenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Tue, 17 Feb 2009 05:13:59 +0000 (14:13 +0900)
committerJesse Barnes <jbarnes@virtuousgeek.org>
Fri, 20 Mar 2009 17:48:02 +0000 (10:48 -0700)
commitd391f00f0e7fb6d883c6724b31a1799e19a584c5
tree02d81d24488963f97c6d4d2e102ead27fcf78ae5
parent267efd7eec5eca62f32f8c9bc1721b578d5da963
PCI hotplug: fix wrong assumption in acpi_get_hp_hw_control_from_firmware

Current acpi_get_hp_hw_control_from_firmware() has a assumption that
pci_bus->self is NULL on a PCI root bus. But it might not be true on
some platforms. Because of this wrong assumption, current
acpi_get_hp_hw_control_from_firmware() might cause endless loop. We
must check pci_bus->parent instead.

Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
drivers/pci/hotplug/acpi_pcihp.c