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Commit b68bacf2 authored by Bob Moore's avatar Bob Moore Committed by Len Brown
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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: default avatarBob Moore <robert.moore@intel.com>
Signed-off-by: default avatarLin Ming <ming.m.lin@intel.com>
Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent 65f4692c

drivers/acpi/namespace/nseval.c

+21 −0
Original line number Diff line number Diff line
@@ -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