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| author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-08-27 01:28:48 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-08-27 01:28:48 +0200 |
| commit | afdca01c9821134e71011029a194dd8fcb88c97e (patch) | |
| tree | c3a4862547760c3aaae5a8260ba3796a40bf47a6 /drivers/acpi/acpica/uteval.c | |
| parent | 4b319f290d3b9c756228a66f72095d0039ec1b50 (diff) | |
| parent | 36b99b22877bd25162239f1b00477ee6ae2d01ee (diff) | |
| download | kernel_goldelico_gta04-afdca01c9821134e71011029a194dd8fcb88c97e.zip kernel_goldelico_gta04-afdca01c9821134e71011029a194dd8fcb88c97e.tar.gz kernel_goldelico_gta04-afdca01c9821134e71011029a194dd8fcb88c97e.tar.bz2 | |
Merge branch 'acpica'
* acpica:
ACPICA: Update version to 20130725.
ACPICA: Update names for walk_namespace callbacks to clarify usage.
ACPICA: Return error if DerefOf resolves to a null package element.
ACPICA: Make ACPI Power Management Timer (PM Timer) optional.
ACPICA: Fix divergences of the commit - ACPICA: Expose OSI version.
ACPICA: Fix possible fault for methods that optionally have no return value.
ACPICA: DeRefOf operator: Update to fully resolve FieldUnit and BufferField refs.
ACPICA: Emit all unresolved method externals in a text block
ACPICA: Export acpi_tb_validate_rsdp().
ACPI: Add facility to remove all _OSI strings
ACPI: Add facility to disable all _OSI OS vendor strings
ACPICA: Add acpi_update_interfaces() public interface
ACPICA: Update version to 20130626
ACPICA: Fix compiler warnings for casting issues (only some compilers)
ACPICA: Remove restriction of 256 maximum GPEs in any GPE block
ACPICA: Disassembler: Expand maximum output string length to 64K
ACPICA: TableManager: Export acpi_tb_scan_memory_for_rsdp()
ACPICA: Update comments about behavior when _STA does not exist
Diffstat (limited to 'drivers/acpi/acpica/uteval.c')
| -rw-r--r-- | drivers/acpi/acpica/uteval.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/acpi/acpica/uteval.c b/drivers/acpi/acpica/uteval.c index ee83adb..4fd6897 100644 --- a/drivers/acpi/acpica/uteval.c +++ b/drivers/acpi/acpica/uteval.c @@ -239,7 +239,8 @@ acpi_ut_evaluate_numeric_object(char *object_name, * RETURN: Status * * DESCRIPTION: Executes _STA for selected device and stores results in - * *Flags. + * *Flags. If _STA does not exist, then the device is assumed + * to be present/functional/enabled (as per the ACPI spec). * * NOTE: Internal function, no parameter validation * @@ -257,6 +258,11 @@ acpi_ut_execute_STA(struct acpi_namespace_node *device_node, u32 * flags) ACPI_BTYPE_INTEGER, &obj_desc); if (ACPI_FAILURE(status)) { if (AE_NOT_FOUND == status) { + /* + * if _STA does not exist, then (as per the ACPI specification), + * the returned flags will indicate that the device is present, + * functional, and enabled. + */ ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "_STA on %4.4s was not found, assuming device is present\n", acpi_ut_get_node_name(device_node))); |