ACPI: Add support for acpi_load_table/acpi_unload_table_id

[sfrench/cifs-2.6.git] / drivers / acpi / namespace / nsxfobj.c

diff --git a/drivers/acpi/namespace/nsxfobj.c b/drivers/acpi/namespace/nsxfobj.c
index a163e1d3708d1a2ba96f3149aed56e1ca1da2eb6..a18b1c223129820da9513a78be11d1cbb1eb73e2 100644 (file)
--- a/drivers/acpi/namespace/nsxfobj.c
+++ b/drivers/acpi/namespace/nsxfobj.c
@@ -48,6 +48,50 @@
 #define _COMPONENT          ACPI_NAMESPACE
 ACPI_MODULE_NAME("nsxfobj")
 
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_get_id
+ *
+ * PARAMETERS:  Handle          - Handle of object whose id is desired
+ *              ret_id          - Where the id will be placed
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: This routine returns the owner id associated with a handle
+ *
+ ******************************************************************************/
+acpi_status acpi_get_id(acpi_handle handle, acpi_owner_id * ret_id)
+{
+       struct acpi_namespace_node *node;
+       acpi_status status;
+
+       /* Parameter Validation */
+
+       if (!ret_id) {
+               return (AE_BAD_PARAMETER);
+       }
+
+       status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
+       if (ACPI_FAILURE(status)) {
+               return (status);
+       }
+
+       /* Convert and validate the handle */
+
+       node = acpi_ns_map_handle_to_node(handle);
+       if (!node) {
+               (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
+               return (AE_BAD_PARAMETER);
+       }
+
+       *ret_id = node->owner_id;
+
+       status = acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
+       return (status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_get_id)
+
 /*******************************************************************************
  *
  * FUNCTION:    acpi_get_type