Commit 3effba32 authored by Bob Moore's avatar Bob Moore Committed by Len Brown
Browse files

ACPICA: Update comments 



Signed-off-by: default avatarAlexey Starikovskiy <alexey.y.starikovskiy@intel.com>
Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent ec3153fb

drivers/acpi/namespace/nswalk.c

+25 −21
Original line number Diff line number Diff line
@@ -193,21 +193,28 @@ acpi_ns_walk_namespace(acpi_object_type type, 
		    acpi_ns_get_next_node(ACPI_TYPE_ANY, parent_node,

					  child_node);

		if (child_node) {

			/*

			 * Found node, Get the type if we are not

			 * searching for ANY

			 */



			/* Found node, Get the type if we are not searching for ANY */



			if (type != ACPI_TYPE_ANY) {

				child_type = child_node->type;

			}



			/*

			 * 1) Type must match

			 * 2) Permanent namespace nodes are OK

			 * 3) Ignore temporary nodes unless told otherwise. Typically,

			 *    the temporary nodes can cause a race condition where they can

			 *    be deleted during the execution of the user function. Only the

			 *    debugger namespace dump will examine the temporary nodes.

			 */

			if ((child_type == type) &&

			    (!(child_node->flags & ANOBJ_TEMPORARY) ||

			     (child_node->flags & ANOBJ_TEMPORARY)

			     && (flags & ACPI_NS_WALK_TEMP_NODES))) {

				/*

				 * Found a matching node, invoke the user

				 * callback function

				 * Found a matching node, invoke the user callback function.

				 * Unlock the namespace if flag is set.

				 */

				if (flags & ACPI_NS_WALK_UNLOCK) {

					mutex_status =
@@ -219,8 +226,9 @@ acpi_ns_walk_namespace(acpi_object_type type, 
					}

				}



				status = user_function(child_node, level,

						       context, return_value);

				status =

				    user_function(child_node, level, context,

						  return_value);



				if (flags & ACPI_NS_WALK_UNLOCK) {

					mutex_status =
@@ -254,20 +262,17 @@ acpi_ns_walk_namespace(acpi_object_type type, 
			}



			/*

			 * Depth first search:

			 * Attempt to go down another level in the namespace

			 * if we are allowed to.  Don't go any further if we

			 * have reached the caller specified maximum depth

			 * or if the user function has specified that the

			 * maximum depth has been reached.

			 * Depth first search: Attempt to go down another level in the

			 * namespace if we are allowed to.  Don't go any further if we have

			 * reached the caller specified maximum depth or if the user

			 * function has specified that the maximum depth has been reached.

			 */

			if ((level < max_depth) && (status != AE_CTRL_DEPTH)) {

				if (acpi_ns_get_next_node

				    (ACPI_TYPE_ANY, child_node, NULL)) {

					/*

					 * There is at least one child of this

					 * node, visit the onde

					 */



					/* There is at least one child of this node, visit it */



					level++;

					parent_node = child_node;

					child_node = NULL;
@@ -275,9 +280,8 @@ acpi_ns_walk_namespace(acpi_object_type type, 
			}

		} else {

			/*

			 * No more children of this node (acpi_ns_get_next_node

			 * failed), go back upwards in the namespace tree to

			 * the node's parent.

			 * No more children of this node (acpi_ns_get_next_node failed), go

			 * back upwards in the namespace tree to the node's parent.

			 */

			level--;

			child_node = parent_node;