From 7a4b8131ac7b47feb110b3e0142d4207ee79a025 Mon Sep 17 00:00:00 2001 From: Lin Ming Date: Thu, 13 Nov 2008 11:25:22 +0800 Subject: [PATCH] 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: Lin Ming Signed-off-by: Bob Moore Signed-off-by: Len Brown --- drivers/acpi/parser/psxface.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/drivers/acpi/parser/psxface.c b/drivers/acpi/parser/psxface.c index 4985ce58c024..41b0c8c052a8 100644 --- a/drivers/acpi/parser/psxface.c +++ b/drivers/acpi/parser/psxface.c @@ -295,6 +295,22 @@ acpi_status acpi_ps_execute_method(struct acpi_evaluate_info *info) 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 */ status = acpi_ps_parse_aml(walk_state); -- 2.34.1