diff --git a/drivers/gpu/drm/drm_client.c b/drivers/gpu/drm/drm_client.c
index 9403b3f576f7..3d4f8b77d078 100644
--- a/drivers/gpu/drm/drm_client.c
+++ b/drivers/gpu/drm/drm_client.c
@@ -172,6 +172,18 @@ void drm_client_release(struct drm_client_dev *client)
 }
 EXPORT_SYMBOL(drm_client_release);
 
+/**
+ * drm_client_dev_unregister - Unregister clients
+ * @dev: DRM device
+ *
+ * This function releases all clients by calling each client's
+ * &drm_client_funcs.unregister callback. The callback function
+ * is responsibe for releaseing all resources including the client
+ * itself.
+ *
+ * The helper drm_dev_unregister() calls this function. Drivers
+ * that use it don't need to call this function themselves.
+ */
 void drm_client_dev_unregister(struct drm_device *dev)
 {
 	struct drm_client_dev *client, *tmp;
@@ -191,6 +203,7 @@ void drm_client_dev_unregister(struct drm_device *dev)
 	}
 	mutex_unlock(&dev->clientlist_mutex);
 }
+EXPORT_SYMBOL(drm_client_dev_unregister);
 
 /**
  * drm_client_dev_hotplug - Send hotplug event to clients