172 	struct tty_struct *tty;  in tty_port_tty_get()  local
175 	tty = tty_kref_get(port->tty);  in tty_port_tty_get()
177 	return tty;  in tty_port_tty_get()
190 void tty_port_tty_set(struct tty_port *port, struct tty_struct *tty)  in tty_port_tty_set()  argument
195 	tty_kref_put(port->tty);  in tty_port_tty_set()
196 	port->tty = tty_kref_get(tty);  in tty_port_tty_set()
201 static void tty_port_shutdown(struct tty_port *port, struct tty_struct *tty)  in tty_port_shutdown()  argument
212 		if (tty && C_HUPCL(tty))  in tty_port_shutdown()
234 	struct tty_struct *tty;  in tty_port_hangup()  local
240 	tty = port->tty;  in tty_port_hangup()
241 	if (tty)  in tty_port_hangup()
242 		set_bit(TTY_IO_ERROR, &tty->flags);  in tty_port_hangup()
243 	port->tty = NULL;  in tty_port_hangup()
245 	tty_port_shutdown(port, tty);  in tty_port_hangup()
246 	tty_kref_put(tty);  in tty_port_hangup()
260 	struct tty_struct *tty = tty_port_tty_get(port);  in tty_port_tty_hangup()  local
262 	if (tty && (!check_clocal || !C_CLOCAL(tty)))  in tty_port_tty_hangup()
263 		tty_hangup(tty);  in tty_port_tty_hangup()
264 	tty_kref_put(tty);  in tty_port_tty_hangup()
275 	struct tty_struct *tty = tty_port_tty_get(port);  in tty_port_tty_wakeup()  local
277 	if (tty) {  in tty_port_tty_wakeup()
278 		tty_wakeup(tty);  in tty_port_tty_wakeup()
279 		tty_kref_put(tty);  in tty_port_tty_wakeup()
359 				struct tty_struct *tty, struct file *filp)  in tty_port_block_til_ready()  argument
367 	if (tty->flags & (1 << TTY_IO_ERROR)) {  in tty_port_block_til_ready()
373 		if (tty->termios.c_cflag & CBAUD)  in tty_port_block_til_ready()
379 	if (C_CLOCAL(tty))  in tty_port_block_til_ready()
396 		if (C_BAUD(tty) && test_bit(ASYNCB_INITIALIZED, &port->flags))  in tty_port_block_til_ready()
421 		tty_unlock(tty);  in tty_port_block_til_ready()
423 		tty_lock(tty);  in tty_port_block_til_ready()
440 static void tty_port_drain_delay(struct tty_port *port, struct tty_struct *tty)  in tty_port_drain_delay()  argument
442 	unsigned int bps = tty_get_baud_rate(tty);  in tty_port_drain_delay()
456 				struct tty_struct *tty, struct file *filp)  in tty_port_close_start()  argument
464 	if (tty->count == 1 && port->count != 1) {  in tty_port_close_start()
483 	tty->closing = 1;  in tty_port_close_start()
487 		if (tty->flow_stopped)  in tty_port_close_start()
488 			tty_driver_flush_buffer(tty);  in tty_port_close_start()
490 			tty_wait_until_sent(tty, port->closing_wait);  in tty_port_close_start()
492 			tty_port_drain_delay(port, tty);  in tty_port_close_start()
495 	tty_ldisc_flush(tty);  in tty_port_close_start()
503 void tty_port_close_end(struct tty_port *port, struct tty_struct *tty)  in tty_port_close_end()  argument
507 	tty_ldisc_flush(tty);  in tty_port_close_end()
508 	tty->closing = 0;  in tty_port_close_end()
531 void tty_port_close(struct tty_port *port, struct tty_struct *tty,  in tty_port_close()  argument
534 	if (tty_port_close_start(port, tty, filp) == 0)  in tty_port_close()
536 	tty_port_shutdown(port, tty);  in tty_port_close()
537 	set_bit(TTY_IO_ERROR, &tty->flags);  in tty_port_close()
538 	tty_port_close_end(port, tty);  in tty_port_close()
554 		struct tty_struct *tty)  in tty_port_install()  argument
556 	tty->port = port;  in tty_port_install()
557 	return tty_standard_install(driver, tty);  in tty_port_install()
569 int tty_port_open(struct tty_port *port, struct tty_struct *tty,  in tty_port_open()  argument
575 	tty_port_tty_set(port, tty);  in tty_port_open()
586 		clear_bit(TTY_IO_ERROR, &tty->flags);  in tty_port_open()
588 			int retval = port->ops->activate(port, tty);  in tty_port_open()
597 	return tty_port_block_til_ready(port, tty, filp);  in tty_port_open()