sfp_bus_add_upstream
ret = sfp_bus_add_upstream(bus, phydev, &sfp_phydev_ops);
ret = sfp_bus_add_upstream(bus, pl, &sfp_phylink_ops);
EXPORT_SYMBOL_GPL(sfp_bus_add_upstream);
int sfp_bus_add_upstream(struct sfp_bus *bus, void *upstream,