268 	WARN_ON(!tty->ldisc);  in tty_ldisc_ref_wait()
269 	return tty->ldisc;  in tty_ldisc_ref_wait()
287 		ld = tty->ldisc;  in tty_ldisc_ref()
493 	tty->ldisc = old;  in tty_ldisc_restore()
501 		tty->ldisc = new_ldisc;  in tty_ldisc_restore()
522 int tty_set_ldisc(struct tty_struct *tty, int ldisc)  in tty_set_ldisc()  argument
527 	new_ldisc = tty_ldisc_get(tty, ldisc);  in tty_set_ldisc()
543 	if (tty->ldisc->ops->num == ldisc) {  in tty_set_ldisc()
550 	old_ldisc = tty->ldisc;  in tty_set_ldisc()
565 	tty->ldisc = new_ldisc;  in tty_set_ldisc()
566 	tty_set_termios_ldisc(tty, ldisc);  in tty_set_ldisc()
575 	if (tty->ldisc->ops->num != old_ldisc->ops->num && tty->ops->set_ldisc) {  in tty_set_ldisc()
628 static int tty_ldisc_reinit(struct tty_struct *tty, int ldisc)  in tty_ldisc_reinit()  argument
630 	struct tty_ldisc *ld = tty_ldisc_get(tty, ldisc);  in tty_ldisc_reinit()
635 	tty_ldisc_close(tty, tty->ldisc);  in tty_ldisc_reinit()
636 	tty_ldisc_put(tty->ldisc);  in tty_ldisc_reinit()
640 	tty->ldisc = ld;  in tty_ldisc_reinit()
641 	tty_set_termios_ldisc(tty, ldisc);  in tty_ldisc_reinit()
667 	tty_ldisc_debug(tty, "closing ldisc: %p\n", tty->ldisc);  in tty_ldisc_hangup()
693 	if (tty->ldisc) {  in tty_ldisc_hangup()
702 				err = tty_ldisc_open(tty, tty->ldisc);  in tty_ldisc_hangup()
710 			WARN_ON(tty_ldisc_open(tty, tty->ldisc));  in tty_ldisc_hangup()
717 	tty_ldisc_debug(tty, "re-opened ldisc: %p\n", tty->ldisc);  in tty_ldisc_hangup()
732 	struct tty_ldisc *ld = tty->ldisc;  in tty_ldisc_setup()
740 		retval = tty_ldisc_open(o_tty, o_tty->ldisc);  in tty_ldisc_setup()
754 	tty_ldisc_close(tty, tty->ldisc);  in tty_ldisc_kill()
755 	tty_ldisc_put(tty->ldisc);  in tty_ldisc_kill()
757 	tty->ldisc = NULL;  in tty_ldisc_kill()
781 	tty_ldisc_debug(tty, "closing ldisc: %p\n", tty->ldisc);  in tty_ldisc_release()
808 	tty->ldisc = ld;  in tty_ldisc_init()
820 	tty_ldisc_put(tty->ldisc);  in tty_ldisc_deinit()
821 	tty->ldisc = NULL;  in tty_ldisc_deinit()