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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>
hifive-unleashed-5.1
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);
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.