[3/6] ACPI/PCI: optimize checks in acpi_pci_osc_control_set()

Commit Message

Kenji Kaneshige July 30, 2010, 6:22 a.m. UTC

None

Patch

Index: linux-2.6.35-rc6/drivers/acpi/pci_root.c
===================================================================
--- linux-2.6.35-rc6.orig/drivers/acpi/pci_root.c
+++ linux-2.6.35-rc6/drivers/acpi/pci_root.c
@@ -388,10 +388,6 @@  acpi_status acpi_pci_osc_control_set(acp
 	acpi_handle tmp;
 	struct acpi_pci_root *root;
 
-	status = acpi_get_handle(handle, "_OSC", &tmp);
-	if (ACPI_FAILURE(status))
-		return status;
-
 	control_req = (flags & OSC_PCI_CONTROL_MASKS);
 	if (!control_req)
 		return AE_TYPE;
@@ -400,6 +396,10 @@  acpi_status acpi_pci_osc_control_set(acp
 	if (!root)
 		return AE_NOT_EXIST;
 
+	status = acpi_get_handle(handle, "_OSC", &tmp);
+	if (ACPI_FAILURE(status))
+		return status;
+
 	mutex_lock(&osc_lock);
 	/* No need to evaluate _OSC if the control was already granted. */
 	if ((root->osc_control_set & control_req) == control_req)