diff options
Diffstat (limited to 'drivers/acpi/acpica/uteval.c')
| -rw-r--r-- | drivers/acpi/acpica/uteval.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/drivers/acpi/acpica/uteval.c b/drivers/acpi/acpica/uteval.c index ee83adb97b1..8fed1482d22 100644 --- a/drivers/acpi/acpica/uteval.c +++ b/drivers/acpi/acpica/uteval.c @@ -5,7 +5,7 @@ *****************************************************************************/ /* - * Copyright (C) 2000 - 2013, Intel Corp. + * Copyright (C) 2000 - 2014, Intel Corp. * All rights reserved. * * Redistribution and use in source and binary forms, with or without @@ -181,7 +181,7 @@ acpi_ut_evaluate_object(struct acpi_namespace_node *prefix_node, *return_desc = info->return_object; - cleanup: +cleanup: ACPI_FREE(info); return_ACPI_STATUS(status); } @@ -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))); |