ACPICA: Enhance implicit return mechanism

[deliverable/linux.git] / drivers / acpi / parser / psxface.c

diff --git a/drivers/acpi/parser/psxface.c b/drivers/acpi/parser/psxface.c
index 270469aae8429201df4edfae11db91d8c5628133..41b0c8c052a8f8235e3c0eff38f9a048245cc70e 100644 (file)
--- a/drivers/acpi/parser/psxface.c
+++ b/drivers/acpi/parser/psxface.c
@@ -45,6 +45,7 @@
 #include <acpi/acparser.h>
 #include <acpi/acdispat.h>
 #include <acpi/acinterp.h>
+#include <acpi/amlcode.h>
 
 #define _COMPONENT          ACPI_PARSER
 ACPI_MODULE_NAME("psxface")
@@ -278,6 +279,38 @@ acpi_status acpi_ps_execute_method(struct acpi_evaluate_info *info)
                goto cleanup;
        }
 
+       /* Invoke an internal method if necessary */
+
+       if (info->obj_desc->method.method_flags & AML_METHOD_INTERNAL_ONLY) {
+               status = info->obj_desc->method.implementation(walk_state);
+               info->return_object = walk_state->return_desc;
+
+               /* Cleanup states */
+
+               acpi_ds_scope_stack_clear(walk_state);
+               acpi_ps_cleanup_scope(&walk_state->parser_state);
+               acpi_ds_terminate_control_method(walk_state->method_desc,
+                                                walk_state);
+               acpi_ds_delete_walk_state(walk_state);
+               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);