Add fu_device_locker_close()

This allows us to manually close the locker, allowing proper error handling.

libfwupdplugin/fu-device-locker.c

@@ -63,6 +63,32 @@ fu_device_locker_init (FuDeviceLocker *self)
 {
 }
 
+/**
+ * fu_device_locker_close:
+ * @self: A #FuDeviceLocker
+ * @error: A #GError, or %NULL
+ *
+ * Closes the locker before it gets cleaned up.
+ *
+ * This function can be used to manually close a device managed by a locker,
+ * and allows the caller to properly handle the error.
+ *
+ * Returns: %TRUE for success
+ *
+ * Since: 1.4.0
+ **/
+gboolean
+fu_device_locker_close (FuDeviceLocker *self, GError **error)
+{
+	g_return_val_if_fail (FU_IS_DEVICE_LOCKER (self), NULL);
+	if (!self->device_open)
+		return TRUE;
+	if (!self->close_func (self->device, error))
+		return FALSE;
+	self->device_open = FALSE;
+	return TRUE;
+}
+
 /**
  * fu_device_locker_new:
  * @device: A #GObject

libfwupdplugin/fu-device-locker.h

@@ -21,3 +21,5 @@ FuDeviceLocker	*fu_device_locker_new_full	(gpointer		 device,
 						 FuDeviceLockerFunc	 open_func,
 						 FuDeviceLockerFunc	 close_func,
 						 GError			**error);
+gboolean	 fu_device_locker_close		(FuDeviceLocker		*self,
+						 GError			**error);

libfwupdplugin/fwupdplugin.map

@@ -547,6 +547,7 @@ LIBFWUPDPLUGIN_1.4.0 {
     fu_cabinet_set_jcat_context;
     fu_cabinet_set_size_max;
     fu_device_get_root;
+    fu_device_locker_close;
     fu_device_set_version_bootloader;
     fu_device_set_version_format;
     fu_device_set_version_lowest;