> +static void linkstate_get_ext_state(struct net_device *dev, > + struct linkstate_reply_data *data) > +{ > + int err; > + > + if (!dev->ethtool_ops->get_ext_state) > + return; > + > + err = dev->ethtool_ops->get_ext_state(dev, &data->ethtool_ext_state_info); > + if (err) { > + data->ext_state_provided = false; > + return; > + } > + > + data->ext_state_provided = true; > } A void function is rather odd for this sort of thing. It is much more normal to return an error code, -EOPNOTSUPP if the op is not available, or 0 if it all went well. Andrew