2013/01/31 7:04, Rafael J. Wysocki wrote:
From: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Make acpi_bus_get_parent() more straightforward and remove an
unnecessary local variable ret from it.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
---
Acked-by: Yasuaki Ishimatsu <isimatu.yasuaki@xxxxxxxxxxxxxx>
drivers/acpi/scan.c | 16 +++++-----------
1 file changed, 5 insertions(+), 11 deletions(-)
Index: test/drivers/acpi/scan.c
===================================================================
--- test.orig/drivers/acpi/scan.c
+++ test/drivers/acpi/scan.c
@@ -871,29 +871,23 @@ EXPORT_SYMBOL(acpi_bus_unregister_driver
-------------------------------------------------------------------------- */
static struct acpi_device *acpi_bus_get_parent(acpi_handle handle)
{
+ struct acpi_device *device = NULL;
acpi_status status;
- int ret;
- struct acpi_device *device;
/*
* Fixed hardware devices do not appear in the namespace and do not
* have handles, but we fabricate acpi_devices for them, so we have
* to deal with them specially.
*/
- if (handle == NULL)
+ if (!handle)
return acpi_root;
do {
status = acpi_get_parent(handle, &handle);
- if (status == AE_NULL_ENTRY)
- return NULL;
if (ACPI_FAILURE(status))
- return acpi_root;
-
- ret = acpi_bus_get_device(handle, &device);
- if (ret == 0)
- return device;
- } while (1);
+ return status == AE_NULL_ENTRY ? NULL : acpi_root;
+ } while (acpi_bus_get_device(handle, &device));
+ return device;
}
acpi_status
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