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Commit 7a4b8131 authored by Lin Ming's avatar Lin Ming Committed by Len Brown
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ACPICA: Enhance implicit return mechanism 



For Windows compatibility, return an implicit integer of value
zero for methods that have no executable code. A default implicit
value of zero is provided for methods. Lin Ming.

Signed-off-by: default avatarLin Ming <ming.m.lin@intel.com>
Signed-off-by: default avatarBob Moore <robert.moore@intel.com>
Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent eeb4437e

drivers/acpi/parser/psxface.c

+16 −0
Original line number Original line Diff line number Diff line
@@ -295,6 +295,22 @@ acpi_status acpi_ps_execute_method(struct acpi_evaluate_info *info) 
		goto cleanup;

		goto cleanup;

	}

	}





	/*

	 * Start method evaluation with an implicit return of zero.

	 * This is done for Windows compatibility.

	 */

	if (acpi_gbl_enable_interpreter_slack) {

		walk_state->implicit_return_obj =

		    acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);

		if (!walk_state->implicit_return_obj) {

			status = AE_NO_MEMORY;

			acpi_ds_delete_walk_state(walk_state);

			goto cleanup;

		}



		walk_state->implicit_return_obj->integer.value = 0;

	}



	/* Parse the AML */

	/* Parse the AML */





	status = acpi_ps_parse_aml(walk_state);

	status = acpi_ps_parse_aml(walk_state);