Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=2f000f5c153e984d5c166e42a9d38113de8693b3
Commit: 2f000f5c153e984d5c166e42a9d38113de8693b3
Parent: 616362de2fe224512fe105aec08f19f5470afb01
Author: Chen, Justin <[EMAIL PROTECTED]>
AuthorDate: Tue Oct 10 17:07:00 2006 -0400
Committer: Len Brown <[EMAIL PROTECTED]>
CommitDate: Fri Oct 27 02:31:16 2006 -0400
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 <[EMAIL PROTECTED]>
Signed-off-by: Len Brown <[EMAIL PROTECTED]>
---
drivers/acpi/glue.c | 6 +++++-
1 files changed, 5 insertions(+), 1 deletions(-)
diff --git a/drivers/acpi/glue.c b/drivers/acpi/glue.c
index 10f160d..ba8fe83 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;
-
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