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 <robert.moore@intel.com>
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/drivers/acpi/namespace/nseval.c b/drivers/acpi/namespace/nseval.c
index d369164..0a1ae67 100644
--- a/drivers/acpi/namespace/nseval.c
+++ b/drivers/acpi/namespace/nseval.c
@@ -195,7 +195,28 @@
} 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