PCI: Run ACPI _OSC method on root bridges only

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According to the PCI Firmware Specification Revision 3.0 section 4.5, _OSC
should only be called on a root brdige.  Here is the relevant passage: "The
_OSC interface defined in this section applies only to Host Bridge ACPI
devices that originate PCI, PCI-X, or PCI Express hierarchies". Changed the
code to find the parent root bridge of the device and call _OSC on that.

Signed-off-by: Andrew Patterson <andrew.patterson@hp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

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Andrew Patterson 2008-01-22 17:18:27 -07:00 • committed by Greg Kroah-Hartman

parent d8634ddd37

commit 3c75e23784

1 changed files with 6 additions and 16 deletions

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22

drivers/pci/pcie/aer/aerdrv_acpi.c

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