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ACPICA: Abort downward walk on temporary node detection.

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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>
This commit is contained in:
Bob Moore 2007-02-02 19:48:21 +03:00 committed by Len Brown
parent 3effba3206
commit c1014629c0
1 changed files with 15 additions and 11 deletions
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26
drivers/acpi/namespace/nswalk.c
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@ -194,24 +194,28 @@ acpi_ns_walk_namespace(acpi_object_type type,
child_node); child_node);
if (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) { if (type != ACPI_TYPE_ANY) {
child_type = child_node->type; child_type = child_node->type;
} }
/* /*
* 1) Type must match * Ignore all temporary namespace nodes (created during control
* 2) Permanent namespace nodes are OK * method execution) unless told otherwise. These temporary nodes
* 3) Ignore temporary nodes unless told otherwise. Typically, * can cause a race condition because they can be deleted during the
* the temporary nodes can cause a race condition where they can * execution of the user function (if the namespace is unlocked before
* be deleted during the execution of the user function. Only the * invocation of the user function.) Only the debugger namespace dump
* debugger namespace dump will examine the temporary nodes. * will examine the temporary nodes.
*/ */
if ((child_type == type) && if ((child_node->flags & ANOBJ_TEMPORARY) &&
(!(child_node->flags & ANOBJ_TEMPORARY) || !(flags & ACPI_NS_WALK_TEMP_NODES)) {
(child_node->flags & ANOBJ_TEMPORARY) status = AE_CTRL_DEPTH;
&& (flags & ACPI_NS_WALK_TEMP_NODES))) { }
/* Type must match requested type */
else if (child_type == type) {
/* /*
* 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. * Unlock the namespace if flag is set.