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authorChen, Justin <justin.chen@hp.com>2006-10-10 17:07:00 -0400
committerLen Brown <len.brown@intel.com>2006-10-27 02:31:16 -0400
commit2f000f5c153e984d5c166e42a9d38113de8693b3 (patch)
treebec7309d65b6ada54c86692df4cfa85a8d57137c /drivers/acpi
parent616362de2fe224512fe105aec08f19f5470afb01 (diff)
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 <justin.chen@hp.com> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi')
-rw-r--r--drivers/acpi/glue.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/acpi/glue.c b/drivers/acpi/glue.c
index 10f160dc75b1..ba8fe83c6298 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)
189 bus = tmp; 189 bus = tmp;
190 190
191 if (seg == find->seg && bus == find->bus) 191 if (seg == find->seg && bus == find->bus)
192 {
192 find->handle = handle; 193 find->handle = handle;
193 status = AE_OK; 194 status = AE_CTRL_TERMINATE;
195 }
196 else
197 status = AE_OK;
194 exit: 198 exit:
195 kfree(buffer.pointer); 199 kfree(buffer.pointer);
196 return status; 200 return status;