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authorBob Moore <robert.moore@intel.com>2007-02-02 19:48:21 +0300
committerLen Brown <len.brown@intel.com>2007-02-02 21:14:28 -0500
commitc1014629c0fc563be65e675e72bcc9bd7db50195 (patch)
tree7e3927c822dde3b79d6185a455649b90575ad48d /drivers/acpi
parent3effba32069514e56bcb778f90cd34fdbac79a50 (diff)
ACPICA: Abort downward walk on temporary node detection.
Enhancement to code that ignores temporary namespace nodes Signed-off-by: Alexey Starikovskiy <alexey.y.starikovskiy@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi')
-rw-r--r--drivers/acpi/namespace/nswalk.c26
1 files changed, 15 insertions, 11 deletions
diff --git a/drivers/acpi/namespace/nswalk.c b/drivers/acpi/namespace/nswalk.c
index c6619d8a516..bccf27d712e 100644
--- a/drivers/acpi/namespace/nswalk.c
+++ b/drivers/acpi/namespace/nswalk.c
@@ -194,24 +194,28 @@ acpi_ns_walk_namespace(acpi_object_type type,
child_node);
if (child_node) {
- /* Found node, Get the type if we are not searching for ANY */
+ /* Found next child, 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.
+ * Ignore all temporary namespace nodes (created during control
+ * method execution) unless told otherwise. These temporary nodes
+ * can cause a race condition because they can be deleted during the
+ * execution of the user function (if the namespace is unlocked before
+ * invocation 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))) {
+ if ((child_node->flags & ANOBJ_TEMPORARY) &&
+ !(flags & ACPI_NS_WALK_TEMP_NODES)) {
+ status = AE_CTRL_DEPTH;
+ }
+
+ /* Type must match requested type */
+
+ else if (child_type == type) {
/*
* Found a matching node, invoke the user callback function.
* Unlock the namespace if flag is set.