uart_port_ref_lock
uport = uart_port_ref_lock(state, &flags);
port = uart_port_ref_lock(state, &flags);
port = uart_port_ref_lock(state, &flags);
uport = uart_port_ref_lock(state, &flags);
uport = uart_port_ref_lock(state, &flags);
uport = uart_port_ref_lock(state, &flags);
port = uart_port_ref_lock(state, &flags);
port = uart_port_ref_lock(state, &flags);
port = uart_port_ref_lock(state, &flags);
port = uart_port_ref_lock(state, &flags);
port = uart_port_ref_lock(state, &flags);