diff -urN linux-2.6.17-mm1-orig/drivers/acpi/motherboard.c linux-2.6.17-mm1/drivers/acpi/motherboard.c
--- linux-2.6.17-mm1-orig/drivers/acpi/motherboard.c	2006-06-23 16:12:01.000000000 -0400
+++ linux-2.6.17-mm1/drivers/acpi/motherboard.c	2006-06-23 18:22:25.000000000 -0400
@@ -88,6 +88,7 @@
 		}
 	} else {
 		/* Memory mapped IO? */
+		 return -EINVAL;
 	}
 
 	if (requested_res)
@@ -97,12 +98,14 @@
 
 static int acpi_motherboard_add(struct acpi_device *device)
 {
+	acpi_status status;
 	if (!device)
 		return -EINVAL;
-	acpi_walk_resources(device->handle, METHOD_NAME__CRS,
+
+	status = acpi_walk_resources(device->handle, METHOD_NAME__CRS,
 			    acpi_reserve_io_ranges, NULL);
 
-	return 0;
+	return status;
 }
 
 static struct acpi_driver acpi_motherboard_driver1 = {