On Fri, Aug 04, 2023 at 05:05:20PM +0200, Petr Pavlu wrote: ... > diff --git a/drivers/net/ethernet/mellanox/mlx4/en_main.c b/drivers/net/ethernet/mellanox/mlx4/en_main.c ... > @@ -326,6 +333,11 @@ static void *mlx4_en_add(struct mlx4_dev *dev) > mutex_init(&mdev->state_lock); > mdev->device_up = true; > > + /* register mlx4 core notifier */ > + mdev->mlx_nb.notifier_call = mlx4_en_event; > + err = mlx4_register_event_notifier(dev, &mdev->mlx_nb); Hi Petr. This fails to build because err isn't declared in this context. > + WARN(err, "failed to register mlx4 event notifier (%d)", err); > + > return mdev; > > err_mr: ...