Merge branch 'upstream-fixes'

1 files changed, 35 insertions, 20 deletions

diff --git a/drivers/acpi/parser/psparse.c b/drivers/acpi/parser/psparse.c
index 76d4d640d83c..a9f3229f4106 100644
--- a/drivers/acpi/parser/psparse.c
+++ b/drivers/acpi/parser/psparse.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2005, R. Byron Moore
+ * Copyright (C) 2000 - 2006, R. Byron Moore
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -333,7 +333,6 @@ acpi_ps_next_parse_state(struct acpi_walk_state *walk_state,
 
 	switch (callback_status) {
 	case AE_CTRL_TERMINATE:
-
 		/*
 		 * A control method was terminated via a RETURN statement.
 		 * The walk of this method is complete.
@@ -346,13 +345,19 @@ acpi_ps_next_parse_state(struct acpi_walk_state *walk_state,
 
 		parser_state->aml = walk_state->aml_last_while;
 		walk_state->control_state->common.value = FALSE;
-		status = AE_CTRL_BREAK;
+		status = acpi_ds_result_stack_pop(walk_state);
+		if (ACPI_SUCCESS(status)) {
+			status = AE_CTRL_BREAK;
+		}
 		break;
 
 	case AE_CTRL_CONTINUE:
 
 		parser_state->aml = walk_state->aml_last_while;
-		status = AE_CTRL_CONTINUE;
+		status = acpi_ds_result_stack_pop(walk_state);
+		if (ACPI_SUCCESS(status)) {
+			status = AE_CTRL_CONTINUE;
+		}
 		break;
 
 	case AE_CTRL_PENDING:
@@ -369,16 +374,18 @@ acpi_ps_next_parse_state(struct acpi_walk_state *walk_state,
 #endif
 
 	case AE_CTRL_TRUE:
-
 		/*
 		 * Predicate of an IF was true, and we are at the matching ELSE.
 		 * Just close out this package
 		 */
 		parser_state->aml = acpi_ps_get_next_package_end(parser_state);
+		status = acpi_ds_result_stack_pop(walk_state);
+		if (ACPI_SUCCESS(status)) {
+			status = AE_CTRL_PENDING;
+		}
 		break;
 
 	case AE_CTRL_FALSE:
-
 		/*
 		 * Either an IF/WHILE Predicate was false or we encountered a BREAK
 		 * opcode.  In both cases, we do not execute the rest of the
@@ -503,22 +510,23 @@ acpi_status acpi_ps_parse_aml(struct acpi_walk_state *walk_state)
 		} else if (status == AE_CTRL_TERMINATE) {
 			status = AE_OK;
 		} else if ((status != AE_OK) && (walk_state->method_desc)) {
-			ACPI_REPORT_METHOD_ERROR("Method execution failed",
-						 walk_state->method_node, NULL,
-						 status);
-
-			/* Ensure proper cleanup */
+			/* Either the method parse or actual execution failed */
 
-			walk_state->parse_flags |= ACPI_PARSE_EXECUTE;
+			ACPI_ERROR_METHOD("Method parse/execution failed",
+					  walk_state->method_node, NULL,
+					  status);
 
 			/* Check for possible multi-thread reentrancy problem */
 
 			if ((status == AE_ALREADY_EXISTS) &&
 			    (!walk_state->method_desc->method.semaphore)) {
 				/*
-				 * This method is marked not_serialized, but it tried to create
+				 * Method tried to create an object twice. The probable cause is
+				 * that the method cannot handle reentrancy.
+				 *
+				 * The method is marked not_serialized, but it tried to create
 				 * a named object, causing the second thread entrance to fail.
-				 * We will workaround this by marking the method permanently
+				 * Workaround this problem by marking the method permanently
 				 * as Serialized.
 				 */
 				walk_state->method_desc->method.method_flags |=
@@ -536,15 +544,23 @@ acpi_status acpi_ps_parse_aml(struct acpi_walk_state *walk_state)
 		acpi_ds_scope_stack_clear(walk_state);
 
 		/*
-		 * If we just returned from the execution of a control method,
-		 * there's lots of cleanup to do
+		 * If we just returned from the execution of a control method or if we
+		 * encountered an error during the method parse phase, there's lots of
+		 * cleanup to do
 		 */
-		if ((walk_state->parse_flags & ACPI_PARSE_MODE_MASK) ==
-		    ACPI_PARSE_EXECUTE) {
+		if (((walk_state->parse_flags & ACPI_PARSE_MODE_MASK) ==
+		     ACPI_PARSE_EXECUTE) || (ACPI_FAILURE(status))) {
 			if (walk_state->method_desc) {
 				/* Decrement the thread count on the method parse tree */
 
-				walk_state->method_desc->method.thread_count--;
+				if (walk_state->method_desc->method.
+				    thread_count) {
+					walk_state->method_desc->method.
+					    thread_count--;
+				} else {
+					ACPI_ERROR((AE_INFO,
+						    "Invalid zero thread count in method"));
+				}
 			}
 
 			acpi_ds_terminate_control_method(walk_state);
@@ -553,7 +569,6 @@ acpi_status acpi_ps_parse_aml(struct acpi_walk_state *walk_state)
 		/* Delete this walk state and all linked control states */
 
 		acpi_ps_cleanup_scope(&walk_state->parser_state);
-
 		previous_walk_state = walk_state;
 
 		ACPI_DEBUG_PRINT((ACPI_DB_PARSE,