588 	struct tty_ldisc *ld;  in tty_wakeup()  local
591 		ld = tty_ldisc_ref(tty);  in tty_wakeup()
592 		if (ld) {  in tty_wakeup()
593 			if (ld->ops->write_wakeup)  in tty_wakeup()
594 				ld->ops->write_wakeup(tty);  in tty_wakeup()
595 			tty_ldisc_deref(ld);  in tty_wakeup()
1060 	struct tty_ldisc *ld;  in tty_read()  local
1069 	ld = tty_ldisc_ref_wait(tty);  in tty_read()
1070 	if (ld->ops->read)  in tty_read()
1071 		i = ld->ops->read(tty, file, buf, count);  in tty_read()
1074 	tty_ldisc_deref(ld);  in tty_read()
1232  	struct tty_ldisc *ld;  in tty_write()  local
1244 	ld = tty_ldisc_ref_wait(tty);  in tty_write()
1245 	if (!ld->ops->write)  in tty_write()
1248 		ret = do_tty_write(ld->ops->write, tty, file, buf, count);  in tty_write()
1249 	tty_ldisc_deref(ld);  in tty_write()
2194 	struct tty_ldisc *ld;  in tty_poll()  local
2200 	ld = tty_ldisc_ref_wait(tty);  in tty_poll()
2201 	if (ld->ops->poll)  in tty_poll()
2202 		ret = ld->ops->poll(tty, filp, wait);  in tty_poll()
2203 	tty_ldisc_deref(ld);  in tty_poll()
2282 	struct tty_ldisc *ld;  in tiocsti()  local
2289 	ld = tty_ldisc_ref_wait(tty);  in tiocsti()
2290 	ld->ops->receive_buf(tty, &ch, &mbz, 1);  in tiocsti()
2291 	tty_ldisc_deref(ld);  in tiocsti()
2678 	struct tty_ldisc *ld;  in tiocgetd()  local
2681 	ld = tty_ldisc_ref_wait(tty);  in tiocgetd()
2682 	ret = put_user(ld->ops->num, p);  in tiocgetd()
2683 	tty_ldisc_deref(ld);  in tiocgetd()
2847 	struct tty_ldisc *ld;  in tty_ioctl()  local
2978 	ld = tty_ldisc_ref_wait(tty);  in tty_ioctl()
2980 	if (ld->ops->ioctl) {  in tty_ioctl()
2981 		retval = ld->ops->ioctl(tty, file, cmd, arg);  in tty_ioctl()
2985 	tty_ldisc_deref(ld);  in tty_ioctl()
2994 	struct tty_ldisc *ld;  in tty_compat_ioctl()  local
3006 	ld = tty_ldisc_ref_wait(tty);  in tty_compat_ioctl()
3007 	if (ld->ops->compat_ioctl)  in tty_compat_ioctl()
3008 		retval = ld->ops->compat_ioctl(tty, file, cmd, arg);  in tty_compat_ioctl()
3011 	tty_ldisc_deref(ld);  in tty_compat_ioctl()