ethnl_cable_test_alloc
ret = ethnl_cable_test_alloc(phydev, ETHTOOL_MSG_CABLE_TEST_NTF);
err = ethnl_cable_test_alloc(phydev, ETHTOOL_MSG_CABLE_TEST_NTF);
err = ethnl_cable_test_alloc(phydev, ETHTOOL_MSG_CABLE_TEST_TDR_NTF);
int ethnl_cable_test_alloc(struct phy_device *phydev, u8 cmd);
EXPORT_SYMBOL_GPL(ethnl_cable_test_alloc);