From b68bacf225e5e9758472e99505d76125ced3ea88 Mon Sep 17 00:00:00 2001 From: Bob Moore Date: Sat, 27 Sep 2008 10:29:31 +0800 Subject: [PATCH] ACPICA: Disallow evaluation of named object types with no value Return AE_TYPE for objects that have no value and therefore evaluation is undefined: Device, Event, Mutex, Region, Thermal, and Scope. Signed-off-by: Bob Moore Signed-off-by: Lin Ming Signed-off-by: Len Brown --- drivers/acpi/namespace/nseval.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/drivers/acpi/namespace/nseval.c b/drivers/acpi/namespace/nseval.c index d369164e00b..0a1ae670a84 100644 --- a/drivers/acpi/namespace/nseval.c +++ b/drivers/acpi/namespace/nseval.c @@ -195,7 +195,28 @@ acpi_status acpi_ns_evaluate(struct acpi_evaluate_info * info) } else { /* * 2) Object is not a method, return its current value + * + * Disallow certain object types. For these, "evaluation" is undefined. */ + switch (info->resolved_node->type) { + case ACPI_TYPE_DEVICE: + case ACPI_TYPE_EVENT: + case ACPI_TYPE_MUTEX: + case ACPI_TYPE_REGION: + case ACPI_TYPE_THERMAL: + case ACPI_TYPE_LOCAL_SCOPE: + + ACPI_ERROR((AE_INFO, + "[%4.4s] Evaluation of object type [%s] is not supported", + info->resolved_node->name.ascii, + acpi_ut_get_type_name(info->resolved_node-> + type))); + + return_ACPI_STATUS(AE_TYPE); + + default: + break; + } /* * Objects require additional resolution steps (e.g., the Node may be -- 2.41.1