ACPICA: Optimization: Reduce the number of namespace walks

On control method exit, only walk the namespace if the method is
known to have created namespace objects outside of its local scope.

Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 16 insertions, 2 deletions

diff --git a/drivers/acpi/acpica/dsmethod.c b/drivers/acpi/acpica/dsmethod.c
index 00846333773e..64750ee96e20 100644
--- a/drivers/acpi/acpica/dsmethod.c
+++ b/drivers/acpi/acpica/dsmethod.c
@@ -584,8 +584,22 @@ acpi_ds_terminate_control_method(union acpi_operand_object *method_desc,
                  * want make the objects permanent.
                  */
                 if (!(method_desc->method.flags & AOPOBJ_MODULE_LEVEL)) {
-                        acpi_ns_delete_namespace_by_owner(method_desc->method.
-                                                          owner_id);
+
+                        /* Delete any direct children of (created by) this method */
+
+                        acpi_ns_delete_namespace_subtree(walk_state->
+                                                         method_node);
+
+                        /*
+                         * Delete any objects that were created by this method
+                         * elsewhere in the namespace (if any were created).
+                         */
+                        if (method_desc->method.
+                            flags & AOPOBJ_MODIFIED_NAMESPACE) {
+                                acpi_ns_delete_namespace_by_owner(method_desc->
+                                                                  method.
+                                                                  owner_id);
+                        }
                 }
         }