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ACPI: optimize pci_rootbridge search

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acpi_get_pci_rootbridge_handle() walks the ACPI name space
searching for seg, bus and the PCI_ROOT_HID_STRING --
returning the handle as soon as if find the match.

But the current codes always parses through the whole namespace because
the user_function find_pci_rootbridge() returns status=AE_OK when it finds the match.

Make the find_pci_rootbridge() return AE_CTRL_TERMINATE when it finds the match.
This reduces the ACPI namespace walk for acpi_get_pci_rootbridge_handle().

Signed-off-by: Justin Chen <justin.chen@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Chen, Justin 2006-10-10 17:07:00 -04:00 committed by Len Brown
parent 616362de2f
commit 2f000f5c15
1 changed files with 5 additions and 1 deletions
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6
drivers/acpi/glue.c
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@ -189,8 +189,12 @@ find_pci_rootbridge(acpi_handle handle, u32 lvl, void *context, void **rv)
bus = tmp; bus = tmp;
if (seg == find->seg && bus == find->bus) if (seg == find->seg && bus == find->bus)
{
find->handle = handle; find->handle = handle;
status = AE_OK; status = AE_CTRL_TERMINATE;
}
else
status = AE_OK;
exit: exit:
kfree(buffer.pointer); kfree(buffer.pointer);
return status; return status;