mlx4_get_slave_port_state
prev_state = mlx4_get_slave_port_state(dev->dev, slave_id, port_num);
if (mlx4_get_slave_port_state(dev, vf, port) == SLAVE_PORT_UP)
EXPORT_SYMBOL(mlx4_get_slave_port_state);
mlx4_get_slave_port_state(dev, slave, port);
ret = mlx4_get_slave_port_state(dev, slave, port);
enum slave_port_state mlx4_get_slave_port_state(struct mlx4_dev *dev, int slave, u8 port);