26 	struct tty_struct *tty;  in tty_port_default_receive_buf()  local
29 	tty = READ_ONCE(port->itty);  in tty_port_default_receive_buf()
30 	if (!tty)  in tty_port_default_receive_buf()
33 	ld = tty_ldisc_ref(tty);  in tty_port_default_receive_buf()
47 	struct tty_struct *tty;  in tty_port_default_lookahead_buf()  local
50 	tty = READ_ONCE(port->itty);  in tty_port_default_lookahead_buf()
51 	if (!tty)  in tty_port_default_lookahead_buf()
54 	ld = tty_ldisc_ref(tty);  in tty_port_default_lookahead_buf()
59 		ld->ops->lookahead_buf(ld->tty, p, f, count);  in tty_port_default_lookahead_buf()
66 	struct tty_struct *tty = tty_port_tty_get(port);  in tty_port_default_wakeup()  local
68 	if (tty) {  in tty_port_default_wakeup()
69 		tty_wakeup(tty);  in tty_port_default_wakeup()
70 		tty_kref_put(tty);  in tty_port_default_wakeup()
323 	struct tty_struct *tty;  in tty_port_tty_get()  local
326 	tty = tty_kref_get(port->tty);  in tty_port_tty_get()
328 	return tty;  in tty_port_tty_get()
340 void tty_port_tty_set(struct tty_port *port, struct tty_struct *tty)  in tty_port_tty_set()  argument
345 	tty_kref_put(port->tty);  in tty_port_tty_set()
346 	port->tty = tty_kref_get(tty);  in tty_port_tty_set()
361 static void tty_port_shutdown(struct tty_port *port, struct tty_struct *tty)  in tty_port_shutdown()  argument
373 		if (tty && C_HUPCL(tty))  in tty_port_shutdown()
394 	struct tty_struct *tty;  in tty_port_hangup()  local
399 	tty = port->tty;  in tty_port_hangup()
400 	if (tty)  in tty_port_hangup()
401 		set_bit(TTY_IO_ERROR, &tty->flags);  in tty_port_hangup()
402 	port->tty = NULL;  in tty_port_hangup()
405 	tty_port_shutdown(port, tty);  in tty_port_hangup()
406 	tty_kref_put(tty);  in tty_port_hangup()
419 	struct tty_struct *tty = tty_port_tty_get(port);  in tty_port_tty_hangup()  local
421 	if (tty && (!check_clocal || !C_CLOCAL(tty)))  in tty_port_tty_hangup()
422 		tty_hangup(tty);  in tty_port_tty_hangup()
423 	tty_kref_put(tty);  in tty_port_tty_hangup()
509 				struct tty_struct *tty, struct file *filp)  in tty_port_block_til_ready()  argument
518 	if (tty_io_error(tty)) {  in tty_port_block_til_ready()
524 		if (C_BAUD(tty))  in tty_port_block_til_ready()
530 	if (C_CLOCAL(tty))  in tty_port_block_til_ready()
548 		if (C_BAUD(tty) && tty_port_initialized(port))  in tty_port_block_til_ready()
574 		tty_unlock(tty);  in tty_port_block_til_ready()
576 		tty_lock(tty);  in tty_port_block_til_ready()
594 static void tty_port_drain_delay(struct tty_port *port, struct tty_struct *tty)  in tty_port_drain_delay()  argument
596 	unsigned int bps = tty_get_baud_rate(tty);  in tty_port_drain_delay()
624 				struct tty_struct *tty, struct file *filp)  in tty_port_close_start()  argument
632 	if (tty->count == 1 && port->count != 1) {  in tty_port_close_start()
633 		tty_warn(tty, "%s: tty->count = 1 port count = %d\n", __func__,  in tty_port_close_start()
638 		tty_warn(tty, "%s: bad port count (%d)\n", __func__,  in tty_port_close_start()
649 	tty->closing = 1;  in tty_port_close_start()
653 		if (tty->flow.tco_stopped)  in tty_port_close_start()
654 			tty_driver_flush_buffer(tty);  in tty_port_close_start()
656 			tty_wait_until_sent(tty, port->closing_wait);  in tty_port_close_start()
658 			tty_port_drain_delay(port, tty);  in tty_port_close_start()
661 	tty_ldisc_flush(tty);  in tty_port_close_start()
679 void tty_port_close_end(struct tty_port *port, struct tty_struct *tty)  in tty_port_close_end()  argument
683 	tty_ldisc_flush(tty);  in tty_port_close_end()
684 	tty->closing = 0;  in tty_port_close_end()
713 void tty_port_close(struct tty_port *port, struct tty_struct *tty,  in tty_port_close()  argument
716 	if (tty_port_close_start(port, tty, filp) == 0)  in tty_port_close()
718 	tty_port_shutdown(port, tty);  in tty_port_close()
720 		set_bit(TTY_IO_ERROR, &tty->flags);  in tty_port_close()
721 	tty_port_close_end(port, tty);  in tty_port_close()
737 		struct tty_struct *tty)  in tty_port_install()  argument
739 	tty->port = port;  in tty_port_install()
740 	return tty_standard_install(driver, tty);  in tty_port_install()
763 int tty_port_open(struct tty_port *port, struct tty_struct *tty,  in tty_port_open()  argument
769 	tty_port_tty_set(port, tty);  in tty_port_open()
780 		clear_bit(TTY_IO_ERROR, &tty->flags);  in tty_port_open()
782 			int retval = port->ops->activate(port, tty);  in tty_port_open()
792 	return tty_port_block_til_ready(port, tty, filp);  in tty_port_open()