83 	struct tty_struct	*tty;		/* ptr to TTY structure	     */  member
305 	set_bit(TTY_DO_WRITE_WAKEUP, &sl->tty->flags);  in slc_encaps()
306 	actual = sl->tty->ops->write(sl->tty, sl->xbuff, pos - sl->xbuff);  in slc_encaps()
320 	if (!sl->tty || sl->magic != SLCAN_MAGIC || !netif_running(sl->dev)) {  in slcan_transmit()
329 		clear_bit(TTY_DO_WRITE_WAKEUP, &sl->tty->flags);  in slcan_transmit()
335 	actual = sl->tty->ops->write(sl->tty, sl->xhead, sl->xleft);  in slcan_transmit()
345 static void slcan_write_wakeup(struct tty_struct *tty)  in slcan_write_wakeup()  argument
347 	struct slcan *sl = tty->disc_data;  in slcan_write_wakeup()
366 	if (sl->tty == NULL) {  in slc_xmit()
391 	if (sl->tty) {  in slc_close()
393 		clear_bit(TTY_DO_WRITE_WAKEUP, &sl->tty->flags);  in slc_close()
408 	if (sl->tty == NULL)  in slc_open()
466 static void slcan_receive_buf(struct tty_struct *tty,  in slcan_receive_buf()  argument
469 	struct slcan *sl = (struct slcan *) tty->disc_data;  in slcan_receive_buf()
503 		if (sl->tty)  in slc_sync()
557 static int slcan_open(struct tty_struct *tty)  in slcan_open()  argument
565 	if (tty->ops->write == NULL)  in slcan_open()
577 	sl = tty->disc_data;  in slcan_open()
586 	sl = slc_alloc(tty_devnum(tty));  in slcan_open()
590 	sl->tty = tty;  in slcan_open()
591 	tty->disc_data = sl;  in slcan_open()
607 	tty->receive_room = 65536;	/* We don't flow control */  in slcan_open()
613 	sl->tty = NULL;  in slcan_open()
614 	tty->disc_data = NULL;  in slcan_open()
632 static void slcan_close(struct tty_struct *tty)  in slcan_close()  argument
634 	struct slcan *sl = (struct slcan *) tty->disc_data;  in slcan_close()
637 	if (!sl || sl->magic != SLCAN_MAGIC || sl->tty != tty)  in slcan_close()
641 	tty->disc_data = NULL;  in slcan_close()
642 	sl->tty = NULL;  in slcan_close()
652 static int slcan_hangup(struct tty_struct *tty)  in slcan_hangup()  argument
654 	slcan_close(tty);  in slcan_hangup()
659 static int slcan_ioctl(struct tty_struct *tty, struct file *file,  in slcan_ioctl()  argument
662 	struct slcan *sl = (struct slcan *) tty->disc_data;  in slcan_ioctl()
680 		return tty_mode_ioctl(tty, file, cmd, arg);  in slcan_ioctl()
743 			if (sl->tty) {  in slcan_exit()
745 				tty_hangup(sl->tty);  in slcan_exit()
761 		if (sl->tty) {  in slcan_exit()