151 	struct tty_struct	*tty;  member
183 static ssize_t n_hdlc_tty_read(struct tty_struct *tty, struct file *file,
185 static ssize_t n_hdlc_tty_write(struct tty_struct *tty, struct file *file,
187 static int n_hdlc_tty_ioctl(struct tty_struct *tty, struct file *file,
189 static unsigned int n_hdlc_tty_poll(struct tty_struct *tty, struct file *filp,
191 static int n_hdlc_tty_open(struct tty_struct *tty);
192 static void n_hdlc_tty_close(struct tty_struct *tty);
193 static void n_hdlc_tty_receive(struct tty_struct *tty, const __u8 *cp,
195 static void n_hdlc_tty_wakeup(struct tty_struct *tty);
199 #define tty2n_hdlc(tty)	((struct n_hdlc *) ((tty)->disc_data))  argument
200 #define n_hdlc2tty(n_hdlc)	((n_hdlc)->tty)
222 	struct tty_struct *tty = n_hdlc2tty (n_hdlc);  in n_hdlc_release()  local
229 	wake_up_interruptible (&tty->read_wait);  in n_hdlc_release()
230 	wake_up_interruptible (&tty->write_wait);  in n_hdlc_release()
232 	if (tty->disc_data == n_hdlc)  in n_hdlc_release()
233 		tty->disc_data = NULL;	/* Break the tty->n_hdlc link */  in n_hdlc_release()
276 static void n_hdlc_tty_close(struct tty_struct *tty)  in n_hdlc_tty_close()  argument
278 	struct n_hdlc *n_hdlc = tty2n_hdlc (tty);  in n_hdlc_tty_close()
289 		clear_bit(TTY_NO_WRITE_SPLIT,&tty->flags);  in n_hdlc_tty_close()
291 		tty->disc_data = NULL;  in n_hdlc_tty_close()
292 		if (tty == n_hdlc->backup_tty)  in n_hdlc_tty_close()
294 		if (tty != n_hdlc->tty)  in n_hdlc_tty_close()
297 			n_hdlc->tty = n_hdlc->backup_tty;  in n_hdlc_tty_close()
314 static int n_hdlc_tty_open (struct tty_struct *tty)  in n_hdlc_tty_open()  argument
316 	struct n_hdlc *n_hdlc = tty2n_hdlc (tty);  in n_hdlc_tty_open()
321 		tty->name);  in n_hdlc_tty_open()
335 	tty->disc_data = n_hdlc;  in n_hdlc_tty_open()
336 	n_hdlc->tty    = tty;  in n_hdlc_tty_open()
337 	tty->receive_room = 65536;  in n_hdlc_tty_open()
341 	set_bit(TTY_NO_WRITE_SPLIT,&tty->flags);  in n_hdlc_tty_open()
345 	if (tty->ldisc.ops->flush_buffer)  in n_hdlc_tty_open()
346 		tty->ldisc.ops->flush_buffer(tty);  in n_hdlc_tty_open()
348 	tty_driver_flush_buffer(tty);  in n_hdlc_tty_open()
366 static void n_hdlc_send_frames(struct n_hdlc *n_hdlc, struct tty_struct *tty)  in n_hdlc_send_frames()  argument
399 		tty->flags |= (1 << TTY_DO_WRITE_WAKEUP);  in n_hdlc_send_frames()
400 		actual = tty->ops->write(tty, tbuf->buf, tbuf->count);  in n_hdlc_send_frames()
424 			wake_up_interruptible(&tty->write_wait);  in n_hdlc_send_frames()
441 		tty->flags  &= ~(1 << TTY_DO_WRITE_WAKEUP);  in n_hdlc_send_frames()
462 static void n_hdlc_tty_wakeup(struct tty_struct *tty)  in n_hdlc_tty_wakeup()  argument
464 	struct n_hdlc *n_hdlc = tty2n_hdlc(tty);  in n_hdlc_tty_wakeup()
472 	if (tty != n_hdlc->tty) {  in n_hdlc_tty_wakeup()
473 		tty->flags &= ~(1 << TTY_DO_WRITE_WAKEUP);  in n_hdlc_tty_wakeup()
477 	n_hdlc_send_frames (n_hdlc, tty);  in n_hdlc_tty_wakeup()
491 static void n_hdlc_tty_receive(struct tty_struct *tty, const __u8 *data,  in n_hdlc_tty_receive()  argument
494 	register struct n_hdlc *n_hdlc = tty2n_hdlc (tty);  in n_hdlc_tty_receive()
502 	if (!n_hdlc || tty != n_hdlc->tty)  in n_hdlc_tty_receive()
543 	wake_up_interruptible (&tty->read_wait);  in n_hdlc_tty_receive()
544 	if (n_hdlc->tty->fasync != NULL)  in n_hdlc_tty_receive()
545 		kill_fasync (&n_hdlc->tty->fasync, SIGIO, POLL_IN);  in n_hdlc_tty_receive()
558 static ssize_t n_hdlc_tty_read(struct tty_struct *tty, struct file *file,  in n_hdlc_tty_read()  argument
561 	struct n_hdlc *n_hdlc = tty2n_hdlc(tty);  in n_hdlc_tty_read()
582 		if (test_bit(TTY_OTHER_CLOSED, &tty->flags)) {  in n_hdlc_tty_read()
587 		n_hdlc = tty2n_hdlc (tty);  in n_hdlc_tty_read()
589 			 tty != n_hdlc->tty) {  in n_hdlc_tty_read()
604 		interruptible_sleep_on (&tty->read_wait);  in n_hdlc_tty_read()
643 static ssize_t n_hdlc_tty_write(struct tty_struct *tty, struct file *file,  in n_hdlc_tty_write()  argument
646 	struct n_hdlc *n_hdlc = tty2n_hdlc (tty);  in n_hdlc_tty_write()
674 	add_wait_queue(&tty->write_wait, &wait);  in n_hdlc_tty_write()
686 		n_hdlc = tty2n_hdlc (tty);  in n_hdlc_tty_write()
688 		    tty != n_hdlc->tty) {  in n_hdlc_tty_write()
701 	remove_wait_queue(&tty->write_wait, &wait);  in n_hdlc_tty_write()
710 		n_hdlc_send_frames(n_hdlc,tty);  in n_hdlc_tty_write()
726 static int n_hdlc_tty_ioctl(struct tty_struct *tty, struct file *file,  in n_hdlc_tty_ioctl()  argument
729 	struct n_hdlc *n_hdlc = tty2n_hdlc (tty);  in n_hdlc_tty_ioctl()
757 		count = tty_chars_in_buffer(tty);  in n_hdlc_tty_ioctl()
767 		error = n_tty_ioctl_helper(tty, file, cmd, arg);  in n_hdlc_tty_ioctl()
784 static unsigned int n_hdlc_tty_poll(struct tty_struct *tty, struct file *filp,  in n_hdlc_tty_poll()  argument
787 	struct n_hdlc *n_hdlc = tty2n_hdlc (tty);  in n_hdlc_tty_poll()
793 	if (n_hdlc && n_hdlc->magic == HDLC_MAGIC && tty == n_hdlc->tty) {  in n_hdlc_tty_poll()
797 		poll_wait(filp, &tty->read_wait, wait);  in n_hdlc_tty_poll()
798 		poll_wait(filp, &tty->write_wait, wait);  in n_hdlc_tty_poll()
803 		if (test_bit(TTY_OTHER_CLOSED, &tty->flags))  in n_hdlc_tty_poll()
807 		if (!tty_is_writelocked(tty) &&  in n_hdlc_tty_poll()