loop_idx         1856 drivers/staging/fwserial/fwserial.c 		tty_unregister_device(driver, loop_idx(port));
loop_idx         2225 drivers/staging/fwserial/fwserial.c 						    loop_idx(serial->ports[j]),
loop_idx         2265 drivers/staging/fwserial/fwserial.c 				      loop_idx(serial->ports[j]));