148 	struct tty_struct	*tty;  member
180 static ssize_t n_hdlc_tty_read(struct tty_struct *tty, struct file *file,
182 static ssize_t n_hdlc_tty_write(struct tty_struct *tty, struct file *file,
184 static int n_hdlc_tty_ioctl(struct tty_struct *tty, struct file *file,
186 static unsigned int n_hdlc_tty_poll(struct tty_struct *tty, struct file *filp,
188 static int n_hdlc_tty_open(struct tty_struct *tty);
189 static void n_hdlc_tty_close(struct tty_struct *tty);
190 static void n_hdlc_tty_receive(struct tty_struct *tty, const __u8 *cp,
192 static void n_hdlc_tty_wakeup(struct tty_struct *tty);
196 #define tty2n_hdlc(tty)	((struct n_hdlc *) ((tty)->disc_data))  argument
197 #define n_hdlc2tty(n_hdlc)	((n_hdlc)->tty)
199 static void flush_rx_queue(struct tty_struct *tty)  in flush_rx_queue()  argument
201 	struct n_hdlc *n_hdlc = tty2n_hdlc(tty);  in flush_rx_queue()
208 static void flush_tx_queue(struct tty_struct *tty)  in flush_tx_queue()  argument
210 	struct n_hdlc *n_hdlc = tty2n_hdlc(tty);  in flush_tx_queue()
245 	struct tty_struct *tty = n_hdlc2tty (n_hdlc);  in n_hdlc_release()  local
252 	wake_up_interruptible (&tty->read_wait);  in n_hdlc_release()
253 	wake_up_interruptible (&tty->write_wait);  in n_hdlc_release()
255 	if (tty->disc_data == n_hdlc)  in n_hdlc_release()
256 		tty->disc_data = NULL;	/* Break the tty->n_hdlc link */  in n_hdlc_release()
299 static void n_hdlc_tty_close(struct tty_struct *tty)  in n_hdlc_tty_close()  argument
301 	struct n_hdlc *n_hdlc = tty2n_hdlc (tty);  in n_hdlc_tty_close()
312 		clear_bit(TTY_NO_WRITE_SPLIT,&tty->flags);  in n_hdlc_tty_close()
314 		tty->disc_data = NULL;  in n_hdlc_tty_close()
315 		if (tty == n_hdlc->backup_tty)  in n_hdlc_tty_close()
317 		if (tty != n_hdlc->tty)  in n_hdlc_tty_close()
320 			n_hdlc->tty = n_hdlc->backup_tty;  in n_hdlc_tty_close()
337 static int n_hdlc_tty_open (struct tty_struct *tty)  in n_hdlc_tty_open()  argument
339 	struct n_hdlc *n_hdlc = tty2n_hdlc (tty);  in n_hdlc_tty_open()
344 		tty->name);  in n_hdlc_tty_open()
358 	tty->disc_data = n_hdlc;  in n_hdlc_tty_open()
359 	n_hdlc->tty    = tty;  in n_hdlc_tty_open()
360 	tty->receive_room = 65536;  in n_hdlc_tty_open()
364 	set_bit(TTY_NO_WRITE_SPLIT,&tty->flags);  in n_hdlc_tty_open()
368 	tty_driver_flush_buffer(tty);  in n_hdlc_tty_open()
386 static void n_hdlc_send_frames(struct n_hdlc *n_hdlc, struct tty_struct *tty)  in n_hdlc_send_frames()  argument
419 		set_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);  in n_hdlc_send_frames()
420 		actual = tty->ops->write(tty, tbuf->buf, tbuf->count);  in n_hdlc_send_frames()
444 			wake_up_interruptible(&tty->write_wait);  in n_hdlc_send_frames()
461 		clear_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);  in n_hdlc_send_frames()
482 static void n_hdlc_tty_wakeup(struct tty_struct *tty)  in n_hdlc_tty_wakeup()  argument
484 	struct n_hdlc *n_hdlc = tty2n_hdlc(tty);  in n_hdlc_tty_wakeup()
492 	if (tty != n_hdlc->tty) {  in n_hdlc_tty_wakeup()
493 		clear_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);  in n_hdlc_tty_wakeup()
497 	n_hdlc_send_frames (n_hdlc, tty);  in n_hdlc_tty_wakeup()
511 static void n_hdlc_tty_receive(struct tty_struct *tty, const __u8 *data,  in n_hdlc_tty_receive()  argument
514 	register struct n_hdlc *n_hdlc = tty2n_hdlc (tty);  in n_hdlc_tty_receive()
522 	if (!n_hdlc || tty != n_hdlc->tty)  in n_hdlc_tty_receive()
563 	wake_up_interruptible (&tty->read_wait);  in n_hdlc_tty_receive()
564 	if (n_hdlc->tty->fasync != NULL)  in n_hdlc_tty_receive()
565 		kill_fasync (&n_hdlc->tty->fasync, SIGIO, POLL_IN);  in n_hdlc_tty_receive()
578 static ssize_t n_hdlc_tty_read(struct tty_struct *tty, struct file *file,  in n_hdlc_tty_read()  argument
581 	struct n_hdlc *n_hdlc = tty2n_hdlc(tty);  in n_hdlc_tty_read()
600 	add_wait_queue(&tty->read_wait, &wait);  in n_hdlc_tty_read()
603 		if (test_bit(TTY_OTHER_CLOSED, &tty->flags)) {  in n_hdlc_tty_read()
646 	remove_wait_queue(&tty->read_wait, &wait);  in n_hdlc_tty_read()
662 static ssize_t n_hdlc_tty_write(struct tty_struct *tty, struct file *file,  in n_hdlc_tty_write()  argument
665 	struct n_hdlc *n_hdlc = tty2n_hdlc (tty);  in n_hdlc_tty_write()
691 	add_wait_queue(&tty->write_wait, &wait);  in n_hdlc_tty_write()
706 		n_hdlc = tty2n_hdlc (tty);  in n_hdlc_tty_write()
708 		    tty != n_hdlc->tty) {  in n_hdlc_tty_write()
721 	remove_wait_queue(&tty->write_wait, &wait);  in n_hdlc_tty_write()
730 		n_hdlc_send_frames(n_hdlc,tty);  in n_hdlc_tty_write()
746 static int n_hdlc_tty_ioctl(struct tty_struct *tty, struct file *file,  in n_hdlc_tty_ioctl()  argument
749 	struct n_hdlc *n_hdlc = tty2n_hdlc (tty);  in n_hdlc_tty_ioctl()
777 		count = tty_chars_in_buffer(tty);  in n_hdlc_tty_ioctl()
790 			flush_tx_queue(tty);  in n_hdlc_tty_ioctl()
795 		error = n_tty_ioctl_helper(tty, file, cmd, arg);  in n_hdlc_tty_ioctl()
812 static unsigned int n_hdlc_tty_poll(struct tty_struct *tty, struct file *filp,  in n_hdlc_tty_poll()  argument
815 	struct n_hdlc *n_hdlc = tty2n_hdlc (tty);  in n_hdlc_tty_poll()
821 	if (n_hdlc && n_hdlc->magic == HDLC_MAGIC && tty == n_hdlc->tty) {  in n_hdlc_tty_poll()
825 		poll_wait(filp, &tty->read_wait, wait);  in n_hdlc_tty_poll()
826 		poll_wait(filp, &tty->write_wait, wait);  in n_hdlc_tty_poll()
831 		if (test_bit(TTY_OTHER_CLOSED, &tty->flags))  in n_hdlc_tty_poll()
835 		if (!tty_is_writelocked(tty) &&  in n_hdlc_tty_poll()