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authorLin Ming <ming.m.lin@intel.com>2008-04-10 11:06:42 -0400
committerLen Brown <len.brown@intel.com>2008-04-22 14:29:29 -0400
commit9accd46459b8c068540451fdab07dbfcefaf7280 (patch)
treeac022ee80ed0ff6ea3d3fd10759e98bd58933c40 /drivers/acpi/parser
parent8246934b7cf99d1f0c053d57890775e5d0df9c33 (diff)
ACPICA: Methods now implicitly return 0 in slack mode
Implemented an enhancement to the interpreter "slack mode". In the absence of an explicit return or an implicitly returned object from the last executed opcode, a control method will now implicitly return an integer of value 0 for Microsoft compatibility. http://www.acpica.org/bugzilla/show_bug.cgi?id=392 Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/parser')
-rw-r--r--drivers/acpi/parser/psparse.c24
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/acpi/parser/psparse.c b/drivers/acpi/parser/psparse.c
index a8995ca52ee7..a4c4020c40e9 100644
--- a/drivers/acpi/parser/psparse.c
+++ b/drivers/acpi/parser/psparse.c
@@ -594,6 +594,30 @@ acpi_status acpi_ps_parse_aml(struct acpi_walk_state *walk_state)
594 * The object is deleted 594 * The object is deleted
595 */ 595 */
596 if (!previous_walk_state->return_desc) { 596 if (!previous_walk_state->return_desc) {
597 /*
598 * In slack mode execution, if there is no return value
599 * we should implicitly return zero (0) as a default value.
600 */
601 if (acpi_gbl_enable_interpreter_slack &&
602 !previous_walk_state->
603 implicit_return_obj) {
604 previous_walk_state->
605 implicit_return_obj =
606 acpi_ut_create_internal_object
607 (ACPI_TYPE_INTEGER);
608 if (!previous_walk_state->
609 implicit_return_obj) {
610 return_ACPI_STATUS
611 (AE_NO_MEMORY);
612 }
613
614 previous_walk_state->
615 implicit_return_obj->
616 integer.value = 0;
617 }
618
619 /* Restart the calling control method */
620
597 status = 621 status =
598 acpi_ds_restart_control_method 622 acpi_ds_restart_control_method
599 (walk_state, 623 (walk_state,