576 	struct tty_ldisc *ld;  in tty_wakeup()  local
579 		ld = tty_ldisc_ref(tty);  in tty_wakeup()
580 		if (ld) {  in tty_wakeup()
581 			if (ld->ops->write_wakeup)  in tty_wakeup()
582 				ld->ops->write_wakeup(tty);  in tty_wakeup()
583 			tty_ldisc_deref(ld);  in tty_wakeup()
1063 	struct tty_ldisc *ld;  in tty_read()  local
1072 	ld = tty_ldisc_ref_wait(tty);  in tty_read()
1073 	if (ld->ops->read)  in tty_read()
1074 		i = ld->ops->read(tty, file, buf, count);  in tty_read()
1077 	tty_ldisc_deref(ld);  in tty_read()
1237  	struct tty_ldisc *ld;  in tty_write()  local
1249 	ld = tty_ldisc_ref_wait(tty);  in tty_write()
1250 	if (!ld->ops->write)  in tty_write()
1253 		ret = do_tty_write(ld->ops->write, tty, file, buf, count);  in tty_write()
1254 	tty_ldisc_deref(ld);  in tty_write()
2200 	struct tty_ldisc *ld;  in tty_poll()  local
2206 	ld = tty_ldisc_ref_wait(tty);  in tty_poll()
2207 	if (ld->ops->poll)  in tty_poll()
2208 		ret = ld->ops->poll(tty, filp, wait);  in tty_poll()
2209 	tty_ldisc_deref(ld);  in tty_poll()
2288 	struct tty_ldisc *ld;  in tiocsti()  local
2295 	ld = tty_ldisc_ref_wait(tty);  in tiocsti()
2296 	ld->ops->receive_buf(tty, &ch, &mbz, 1);  in tiocsti()
2297 	tty_ldisc_deref(ld);  in tiocsti()
2685 	struct tty_ldisc *ld;  in tiocgetd()  local
2688 	ld = tty_ldisc_ref_wait(tty);  in tiocgetd()
2689 	ret = put_user(ld->ops->num, p);  in tiocgetd()
2690 	tty_ldisc_deref(ld);  in tiocgetd()
2854 	struct tty_ldisc *ld;  in tty_ioctl()  local
2985 	ld = tty_ldisc_ref_wait(tty);  in tty_ioctl()
2987 	if (ld->ops->ioctl) {  in tty_ioctl()
2988 		retval = ld->ops->ioctl(tty, file, cmd, arg);  in tty_ioctl()
2992 	tty_ldisc_deref(ld);  in tty_ioctl()
3001 	struct tty_ldisc *ld;  in tty_compat_ioctl()  local
3013 	ld = tty_ldisc_ref_wait(tty);  in tty_compat_ioctl()
3014 	if (ld->ops->compat_ioctl)  in tty_compat_ioctl()
3015 		retval = ld->ops->compat_ioctl(tty, file, cmd, arg);  in tty_compat_ioctl()
3018 	tty_ldisc_deref(ld);  in tty_compat_ioctl()