27 	struct tty_struct *tty;  in tty_port_default_receive_buf()  local
30 	tty = READ_ONCE(port->itty);  in tty_port_default_receive_buf()
31 	if (!tty)  in tty_port_default_receive_buf()
34 	disc = tty_ldisc_ref(tty);  in tty_port_default_receive_buf()
47 	struct tty_struct *tty = tty_port_tty_get(port);  in tty_port_default_wakeup()  local
49 	if (tty) {  in tty_port_default_wakeup()
50 		tty_wakeup(tty);  in tty_port_default_wakeup()
51 		tty_kref_put(tty);  in tty_port_default_wakeup()
285 	struct tty_struct *tty;  in tty_port_tty_get()  local
288 	tty = tty_kref_get(port->tty);  in tty_port_tty_get()
290 	return tty;  in tty_port_tty_get()
302 void tty_port_tty_set(struct tty_port *port, struct tty_struct *tty)  in tty_port_tty_set()  argument
307 	tty_kref_put(port->tty);  in tty_port_tty_set()
308 	port->tty = tty_kref_get(tty);  in tty_port_tty_set()
313 static void tty_port_shutdown(struct tty_port *port, struct tty_struct *tty)  in tty_port_shutdown()  argument
325 		if (tty && C_HUPCL(tty))  in tty_port_shutdown()
346 	struct tty_struct *tty;  in tty_port_hangup()  local
351 	tty = port->tty;  in tty_port_hangup()
352 	if (tty)  in tty_port_hangup()
353 		set_bit(TTY_IO_ERROR, &tty->flags);  in tty_port_hangup()
354 	port->tty = NULL;  in tty_port_hangup()
357 	tty_port_shutdown(port, tty);  in tty_port_hangup()
358 	tty_kref_put(tty);  in tty_port_hangup()
372 	struct tty_struct *tty = tty_port_tty_get(port);  in tty_port_tty_hangup()  local
374 	if (tty && (!check_clocal || !C_CLOCAL(tty)))  in tty_port_tty_hangup()
375 		tty_hangup(tty);  in tty_port_tty_hangup()
376 	tty_kref_put(tty);  in tty_port_tty_hangup()
462 				struct tty_struct *tty, struct file *filp)  in tty_port_block_til_ready()  argument
470 	if (tty_io_error(tty)) {  in tty_port_block_til_ready()
476 		if (C_BAUD(tty))  in tty_port_block_til_ready()
482 	if (C_CLOCAL(tty))  in tty_port_block_til_ready()
499 		if (C_BAUD(tty) && tty_port_initialized(port))  in tty_port_block_til_ready()
524 		tty_unlock(tty);  in tty_port_block_til_ready()
526 		tty_lock(tty);  in tty_port_block_til_ready()
543 static void tty_port_drain_delay(struct tty_port *port, struct tty_struct *tty)  in tty_port_drain_delay()  argument
545 	unsigned int bps = tty_get_baud_rate(tty);  in tty_port_drain_delay()
559 				struct tty_struct *tty, struct file *filp)  in tty_port_close_start()  argument
567 	if (tty->count == 1 && port->count != 1) {  in tty_port_close_start()
568 		tty_warn(tty, "%s: tty->count = 1 port count = %d\n", __func__,  in tty_port_close_start()
573 		tty_warn(tty, "%s: bad port count (%d)\n", __func__,  in tty_port_close_start()
584 	tty->closing = 1;  in tty_port_close_start()
588 		if (tty->flow_stopped)  in tty_port_close_start()
589 			tty_driver_flush_buffer(tty);  in tty_port_close_start()
591 			tty_wait_until_sent(tty, port->closing_wait);  in tty_port_close_start()
593 			tty_port_drain_delay(port, tty);  in tty_port_close_start()
596 	tty_ldisc_flush(tty);  in tty_port_close_start()
604 void tty_port_close_end(struct tty_port *port, struct tty_struct *tty)  in tty_port_close_end()  argument
608 	tty_ldisc_flush(tty);  in tty_port_close_end()
609 	tty->closing = 0;  in tty_port_close_end()
630 void tty_port_close(struct tty_port *port, struct tty_struct *tty,  in tty_port_close()  argument
633 	if (tty_port_close_start(port, tty, filp) == 0)  in tty_port_close()
635 	tty_port_shutdown(port, tty);  in tty_port_close()
637 		set_bit(TTY_IO_ERROR, &tty->flags);  in tty_port_close()
638 	tty_port_close_end(port, tty);  in tty_port_close()
654 		struct tty_struct *tty)  in tty_port_install()  argument
656 	tty->port = port;  in tty_port_install()
657 	return tty_standard_install(driver, tty);  in tty_port_install()
669 int tty_port_open(struct tty_port *port, struct tty_struct *tty,  in tty_port_open()  argument
675 	tty_port_tty_set(port, tty);  in tty_port_open()
686 		clear_bit(TTY_IO_ERROR, &tty->flags);  in tty_port_open()
688 			int retval = port->ops->activate(port, tty);  in tty_port_open()
697 	return tty_port_block_til_ready(port, tty, filp);  in tty_port_open()