On Mon, 2006-09-25 at 12:40 +0300, Mika Penttilä wrote:
> Zhang Rui wrote:
> > On Fri, 2006-09-22 at 14:59 +0300, Mika Penttilä wrote:
> >
> >> +static int acpi_pci_bridge_match(struct acpi_device *device)
> >> +{
> >> + acpi_status status;
> >> + acpi_handle handle;
> >> +
> >> + /* pci bridge has _PRT but isn't PNP0A03 */
> >> + status = acpi_get_handle(device->handle, METHOD_NAME__PRT,
> >> &handle);
> >> + if (ACPI_FAILURE(status))
> >> + return -ENODEV;
> >> + if (!acpi_match_ids(device, "PNP0A03"))
> >> + return -ENODEV;
acpi_pci_bridge_match will return 0, if we found a
pci-pci bridge. Because it has a PRT table and its
HID is _NOT_ "PNP0A03".
> >> + return 0;
> >> +}
> >> +
> >>
> >>
> >> You seem to handle pci-pci bridge here incorrectly (returns -ENODEV from
> >> match to PNP0A03)
> >>
> >>
> > Is there any pci-pci bridge that has a _HID of "PNP0A03"?
> >
> > thanks,
> > --Rui
> >
> >
> Don't know, but isn't the purpose here for acpi_pci_bridge_match() to
> match pci-pci bridges also? They won't just because they aren't PNP0A03.
>
> --Mika
According to the ACPI spec, only ACPI PCI Root Bridge has a _HID of
"PNP0A03".
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