From: Chen, Justin Date: Tue, 10 Oct 2006 21:07:00 +0000 (-0400) Subject: ACPI: optimize pci_rootbridge search X-Git-Tag: v2.6.20-rc2~6^2~9^2~3 X-Git-Url: https://openfabrics.org/gitweb/?a=commitdiff_plain;h=2f000f5c153e984d5c166e42a9d38113de8693b3;p=~emulex%2Finfiniband.git ACPI: optimize pci_rootbridge search 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 Signed-off-by: Len Brown --- diff --git a/drivers/acpi/glue.c b/drivers/acpi/glue.c index 10f160dc75b..ba8fe83c629 100644 --- a/drivers/acpi/glue.c +++ b/drivers/acpi/glue.c @@ -189,8 +189,12 @@ find_pci_rootbridge(acpi_handle handle, u32 lvl, void *context, void **rv) bus = tmp; if (seg == find->seg && bus == find->bus) + { find->handle = handle; - status = AE_OK; + status = AE_CTRL_TERMINATE; + } + else + status = AE_OK; exit: kfree(buffer.pointer); return status;