---

yaml --- r: 7842 b: refs/heads/master c: aff8c27 h: refs/heads/master v: v3
git-mirror · Sep 3, 2005 · dd861f0 · dd861f0
1 parent 4a15bea
commit dd861f0
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Showing 11 changed files with 351 additions and 383 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: a94f18810f52d3a6de0a09bee0c7258b62eca262
+refs/heads/master: aff8c2777d1a9edf97f26bf60579f9c931443eb1
diff --git a/trunk/drivers/acpi/dispatcher/dsmethod.c b/trunk/drivers/acpi/dispatcher/dsmethod.c
@@ -207,6 +207,13 @@ acpi_ds_begin_method_execution(struct acpi_namespace_node *method_node,
 		return_ACPI_STATUS(AE_NULL_ENTRY);
 	}
 
+	/* Prevent wraparound of thread count */
+
+	if (obj_desc->method.thread_count == ACPI_UINT8_MAX) {
+		ACPI_REPORT_ERROR(("Method reached maximum reentrancy limit (255)\n"));
+		return_ACPI_STATUS(AE_AML_METHOD_LIMIT);
+	}
+
 	/*
 	 * If there is a concurrency limit on this method, we need to
 	 * obtain a unit from the method semaphore.
@@ -236,6 +243,18 @@ acpi_ds_begin_method_execution(struct acpi_namespace_node *method_node,
 						  ACPI_WAIT_FOREVER);
 	}
 
+	/*
+	 * Allocate an Owner ID for this method, only if this is the first thread
+	 * to begin concurrent execution. We only need one owner_id, even if the
+	 * method is invoked recursively.
+	 */
+	if (!obj_desc->method.owner_id) {
+		status = acpi_ut_allocate_owner_id(&obj_desc->method.owner_id);
+		if (ACPI_FAILURE(status)) {
+			return_ACPI_STATUS(status);
+		}
+	}
+
 	/*
 	 * Increment the method parse tree thread count since it has been
 	 * reentered one more time (even if it is the same thread)
@@ -289,11 +308,6 @@ acpi_ds_call_control_method(struct acpi_thread_state *thread,
 		return_ACPI_STATUS(AE_NULL_OBJECT);
 	}
 
-	status = acpi_ut_allocate_owner_id(&obj_desc->method.owner_id);
-	if (ACPI_FAILURE(status)) {
-		return_ACPI_STATUS(status);
-	}
-
 	/* Init for new method, wait on concurrency semaphore */
 
 	status = acpi_ds_begin_method_execution(method_node, obj_desc,
@@ -345,9 +359,8 @@ acpi_ds_call_control_method(struct acpi_thread_state *thread,
 	}
 	/*
 	 * The resolved arguments were put on the previous walk state's operand
-	 * stack.  Operands on the previous walk state stack always
-	 * start at index 0.
-	 * Null terminate the list of arguments
+	 * stack. Operands on the previous walk state stack always
+	 * start at index 0. Also, null terminate the list of arguments
 	 */
 	this_walk_state->operands[this_walk_state->num_operands] = NULL;
 
@@ -380,21 +393,20 @@ acpi_ds_call_control_method(struct acpi_thread_state *thread,
 
 	if (obj_desc->method.method_flags & AML_METHOD_INTERNAL_ONLY) {
 		status = obj_desc->method.implementation(next_walk_state);
-		return_ACPI_STATUS(status);
 	}
 
-	return_ACPI_STATUS(AE_OK);
-
-	/* On error, we must delete the new walk state */
+	return_ACPI_STATUS(status);
 
       cleanup:
-	acpi_ut_release_owner_id(&obj_desc->method.owner_id);
-	if (next_walk_state && (next_walk_state->method_desc)) {
-		/* Decrement the thread count on the method parse tree */
+	/* Decrement the thread count on the method parse tree */
 
+	if (next_walk_state && (next_walk_state->method_desc)) {
 		next_walk_state->method_desc->method.thread_count--;
 	}
-	(void)acpi_ds_terminate_control_method(next_walk_state);
+
+	/* On error, we must delete the new walk state */
+
+	acpi_ds_terminate_control_method(next_walk_state);
 	acpi_ds_delete_walk_state(next_walk_state);
 	return_ACPI_STATUS(status);
 }
@@ -479,15 +491,15 @@ acpi_ds_restart_control_method(struct acpi_walk_state *walk_state,
  *
  * PARAMETERS:  walk_state          - State of the method
  *
- * RETURN:      Status
+ * RETURN:      None
  *
  * DESCRIPTION: Terminate a control method.  Delete everything that the method
  *              created, delete all locals and arguments, and delete the parse
  *              tree if requested.
  *
  ******************************************************************************/
 
-acpi_status acpi_ds_terminate_control_method(struct acpi_walk_state *walk_state)
+void acpi_ds_terminate_control_method(struct acpi_walk_state *walk_state)
 {
 	union acpi_operand_object *obj_desc;
 	struct acpi_namespace_node *method_node;
@@ -496,14 +508,14 @@ acpi_status acpi_ds_terminate_control_method(struct acpi_walk_state *walk_state)
 	ACPI_FUNCTION_TRACE_PTR("ds_terminate_control_method", walk_state);
 
 	if (!walk_state) {
-		return (AE_BAD_PARAMETER);
+		return_VOID;
 	}
 
 	/* The current method object was saved in the walk state */
 
 	obj_desc = walk_state->method_desc;
 	if (!obj_desc) {
-		return_ACPI_STATUS(AE_OK);
+		return_VOID;
 	}
 
 	/* Delete all arguments and locals */
@@ -517,7 +529,7 @@ acpi_status acpi_ds_terminate_control_method(struct acpi_walk_state *walk_state)
 	 */
 	status = acpi_ut_acquire_mutex(ACPI_MTX_PARSER);
 	if (ACPI_FAILURE(status)) {
-		return_ACPI_STATUS(status);
+		return_VOID;
 	}
 
 	/* Signal completion of the execution of this method if necessary */
@@ -528,7 +540,6 @@ acpi_status acpi_ds_terminate_control_method(struct acpi_walk_state *walk_state)
 					     semaphore, 1);
 		if (ACPI_FAILURE(status)) {
 			ACPI_REPORT_ERROR(("Could not signal method semaphore\n"));
-			status = AE_OK;
 
 			/* Ignore error and continue cleanup */
 		}
@@ -539,9 +550,8 @@ acpi_status acpi_ds_terminate_control_method(struct acpi_walk_state *walk_state)
 				  "*** Not deleting method namespace, there are still %d threads\n",
 				  walk_state->method_desc->method.
 				  thread_count));
-	}
+	} else {		/* This is the last executing thread */
 
-	if (!walk_state->method_desc->method.thread_count) {
 		/*
 		 * Support to dynamically change a method from not_serialized to
 		 * Serialized if it appears that the method is written foolishly and
@@ -574,7 +584,7 @@ acpi_status acpi_ds_terminate_control_method(struct acpi_walk_state *walk_state)
 		 */
 		status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
 		if (ACPI_FAILURE(status)) {
-			return_ACPI_STATUS(status);
+			goto exit;
 		}
 
 		if (method_node->child) {
@@ -590,12 +600,9 @@ acpi_status acpi_ds_terminate_control_method(struct acpi_walk_state *walk_state)
 		status = acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
 		acpi_ut_release_owner_id(&walk_state->method_desc->method.
 					 owner_id);
-
-		if (ACPI_FAILURE(status)) {
-			return_ACPI_STATUS(status);
-		}
 	}
 
-	status = acpi_ut_release_mutex(ACPI_MTX_PARSER);
-	return_ACPI_STATUS(status);
+      exit:
+	(void)acpi_ut_release_mutex(ACPI_MTX_PARSER);
+	return_VOID;
 }
diff --git a/trunk/drivers/acpi/dispatcher/dswload.c b/trunk/drivers/acpi/dispatcher/dswload.c
@@ -486,8 +486,10 @@ acpi_ds_load2_begin_op(struct acpi_walk_state * walk_state,
 		if ((!(walk_state->op_info->flags & AML_NSOPCODE) &&
 		     (walk_state->opcode != AML_INT_NAMEPATH_OP)) ||
 		    (!(walk_state->op_info->flags & AML_NAMED))) {
+#ifdef ACPI_ENABLE_MODULE_LEVEL_CODE
 			if ((walk_state->op_info->class == AML_CLASS_EXECUTE) ||
 			    (walk_state->op_info->class == AML_CLASS_CONTROL)) {
+
 				ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 						  "Begin/EXEC: %s (fl %8.8X)\n",
 						  walk_state->op_info->name,
@@ -499,6 +501,7 @@ acpi_ds_load2_begin_op(struct acpi_walk_state * walk_state,
 				    acpi_ds_exec_begin_op(walk_state, out_op);
 				return_ACPI_STATUS(status);
 			}
+#endif
 			return_ACPI_STATUS(AE_OK);
 		}
 
@@ -731,6 +734,7 @@ acpi_status acpi_ds_load2_end_op(struct acpi_walk_state *walk_state)
 
 	if (!(walk_state->op_info->flags & AML_NSOBJECT)) {
 #ifndef ACPI_NO_METHOD_EXECUTION
+#ifdef ACPI_ENABLE_MODULE_LEVEL_CODE
 		/* No namespace object. Executable opcode? */
 
 		if ((walk_state->op_info->class == AML_CLASS_EXECUTE) ||
@@ -745,6 +749,7 @@ acpi_status acpi_ds_load2_end_op(struct acpi_walk_state *walk_state)
 			status = acpi_ds_exec_end_op(walk_state);
 			return_ACPI_STATUS(status);
 		}
+#endif
 #endif
 		return_ACPI_STATUS(AE_OK);
 	}

diff --git a/trunk/drivers/acpi/parser/psparse.c b/trunk/drivers/acpi/parser/psparse.c
@@ -438,7 +438,6 @@ acpi_ps_next_parse_state(struct acpi_walk_state *walk_state,
 acpi_status acpi_ps_parse_aml(struct acpi_walk_state *walk_state)
 {
 	acpi_status status;
-	acpi_status terminate_status;
 	struct acpi_thread_state *thread;
 	struct acpi_thread_state *prev_walk_list = acpi_gbl_current_walk_list;
 	struct acpi_walk_state *previous_walk_state;
@@ -508,6 +507,10 @@ acpi_status acpi_ps_parse_aml(struct acpi_walk_state *walk_state)
 						 walk_state->method_node, NULL,
 						 status);
 
+			/* Ensure proper cleanup */
+
+			walk_state->parse_flags |= ACPI_PARSE_EXECUTE;
+
 			/* Check for possible multi-thread reentrancy problem */
 
 			if ((status == AE_ALREADY_EXISTS) &&
@@ -524,14 +527,6 @@ acpi_status acpi_ps_parse_aml(struct acpi_walk_state *walk_state)
 			}
 		}
 
-		if (walk_state->method_desc) {
-			/* Decrement the thread count on the method parse tree */
-
-			if (walk_state->method_desc->method.thread_count) {
-				walk_state->method_desc->method.thread_count--;
-			}
-		}
-
 		/* We are done with this walk, move on to the parent if any */
 
 		walk_state = acpi_ds_pop_walk_state(thread);
@@ -546,13 +541,13 @@ acpi_status acpi_ps_parse_aml(struct acpi_walk_state *walk_state)
 		 */
 		if ((walk_state->parse_flags & ACPI_PARSE_MODE_MASK) ==
 		    ACPI_PARSE_EXECUTE) {
-			terminate_status =
-			    acpi_ds_terminate_control_method(walk_state);
-			if (ACPI_FAILURE(terminate_status)) {
-				ACPI_REPORT_ERROR(("Could not terminate control method properly\n"));
+			if (walk_state->method_desc) {
+				/* Decrement the thread count on the method parse tree */
 
-				/* Ignore error and continue */
+				walk_state->method_desc->method.thread_count--;
 			}
+
+			acpi_ds_terminate_control_method(walk_state);
 		}
 
 		/* Delete this walk state and all linked control states */

diff --git a/trunk/drivers/acpi/parser/psxface.c b/trunk/drivers/acpi/parser/psxface.c
@@ -98,16 +98,6 @@ acpi_status acpi_ps_execute_method(struct acpi_parameter_info *info)
 		return_ACPI_STATUS(status);
 	}
 
-	/*
-	 * Get a new owner_id for objects created by this method. Namespace
-	 * objects (such as Operation Regions) can be created during the
-	 * first pass parse.
-	 */
-	status = acpi_ut_allocate_owner_id(&info->obj_desc->method.owner_id);
-	if (ACPI_FAILURE(status)) {
-		return_ACPI_STATUS(status);
-	}
-
 	/*
 	 * The caller "owns" the parameters, so give each one an extra
 	 * reference
@@ -139,10 +129,6 @@ acpi_status acpi_ps_execute_method(struct acpi_parameter_info *info)
 	status = acpi_ps_execute_pass(info);
 
       cleanup:
-	if (info->obj_desc->method.owner_id) {
-		acpi_ut_release_owner_id(&info->obj_desc->method.owner_id);
-	}
-
 	/* Take away the extra reference that we gave the parameters above */
 
 	acpi_ps_update_parameter_list(info, REF_DECREMENT);