ACPICA: Add support to delete all objects attached to the root namespace node.

This fix deletes any and all objects that have been attached to the
root node (via acpi_attach_data). Reported by Tomasz Nowicki.
ACPICA BZ 1026.

Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/acpi/acpica/nsalloc.c b/drivers/acpi/acpica/nsalloc.c
index bc3f598257a20b97a8826cf9bd3a5fae7fd3aa3b..fd1ff54cda1911a1e520440afd8a48125d927069 100644 (file)
--- a/drivers/acpi/acpica/nsalloc.c
+++ b/drivers/acpi/acpica/nsalloc.c
@@ -134,6 +134,12 @@ void acpi_ns_delete_node(struct acpi_namespace_node *node)
                obj_desc = next_desc;
        }
 
+       /* Special case for the statically allocated root node */
+
+       if (node == acpi_gbl_root_node) {
+               return;
+       }
+
        /* Now we can delete the node */
 
        (void)acpi_os_release_object(acpi_gbl_namespace_cache, node);

diff --git a/drivers/acpi/acpica/nsutils.c b/drivers/acpi/acpica/nsutils.c
index cc2fea94c5f0939fcbfe87c676c0e869171a14f5..4a0665b6bcc11c6c6eb8aad3ee62be15b6122694 100644 (file)
--- a/drivers/acpi/acpica/nsutils.c
+++ b/drivers/acpi/acpica/nsutils.c
@@ -593,24 +593,26 @@ struct acpi_namespace_node *acpi_ns_validate_handle(acpi_handle handle)
 
 void acpi_ns_terminate(void)
 {
-       union acpi_operand_object *obj_desc;
+       acpi_status status;
 
        ACPI_FUNCTION_TRACE(ns_terminate);
 
        /*
-        * 1) Free the entire namespace -- all nodes and objects
-        *
-        * Delete all object descriptors attached to namepsace nodes
+        * Free the entire namespace -- all nodes and all objects
+        * attached to the nodes
         */
        acpi_ns_delete_namespace_subtree(acpi_gbl_root_node);
 
-       /* Detach any objects attached to the root */
+       /* Delete any objects attached to the root node */
 
-       obj_desc = acpi_ns_get_attached_object(acpi_gbl_root_node);
-       if (obj_desc) {
-               acpi_ns_detach_object(acpi_gbl_root_node);
+       status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
+       if (ACPI_FAILURE(status)) {
+               return_VOID;
        }
 
+       acpi_ns_delete_node(acpi_gbl_root_node);
+       (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
+
        ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Namespace freed\n"));
        return_VOID;
 }