diff options
| author | Bob Moore <robert.moore@intel.com> | 2013-07-17 09:48:15 +0800 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-07-23 01:06:49 +0200 |
| commit | a7d5caf6d21814a855422df75c2d8c093cb2019a (patch) | |
| tree | 9c86c64aa1f4b020f17af3db44d9f17ee2dcedff /drivers/acpi/acpica/nsxfname.c | |
| parent | 3b2f64d00c46e1e4e9bd0bb9bb12619adac27a4b (diff) | |
ACPICA: Update comments about behavior when _STA does not exist
No functional change. Add some comments concerning behavior
when the _STA method does not exist. According to the ACPI
specification, in this case the device should be assumed to be
present, functional, and enabled.
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Acked-by: Len Brown <len.brown@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi/acpica/nsxfname.c')
| -rw-r--r-- | drivers/acpi/acpica/nsxfname.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/acpi/acpica/nsxfname.c b/drivers/acpi/acpica/nsxfname.c index f3a4d95899f7..21a2ef363ad4 100644 --- a/drivers/acpi/acpica/nsxfname.c +++ b/drivers/acpi/acpica/nsxfname.c @@ -379,9 +379,14 @@ acpi_get_object_info(acpi_handle handle, * Get extra info for ACPI Device/Processor objects only: * Run the _STA, _ADR and, sx_w, and _sx_d methods. * - * Note: none of these methods are required, so they may or may + * Notes: none of these methods are required, so they may or may * not be present for this device. The Info->Valid bitfield is used * to indicate which methods were found and run successfully. + * + * For _STA, if the method does not exist, then (as per the ACPI + * specification), the returned current_status flags will indicate + * that the device is present/functional/enabled. Otherwise, the + * current_status flags reflect the value returned from _STA. */ /* Execute the Device._STA method */ |