161 static void flush_rx_queue(struct tty_struct *tty)  in flush_rx_queue()  argument
163 	struct n_hdlc *n_hdlc = tty->disc_data;  in flush_rx_queue()
170 static void flush_tx_queue(struct tty_struct *tty)  in flush_tx_queue()  argument
172 	struct n_hdlc *n_hdlc = tty->disc_data;  in flush_tx_queue()
196 static void n_hdlc_tty_close(struct tty_struct *tty)  in n_hdlc_tty_close()  argument
198 	struct n_hdlc *n_hdlc = tty->disc_data;  in n_hdlc_tty_close()
205 	clear_bit(TTY_NO_WRITE_SPLIT, &tty->flags);  in n_hdlc_tty_close()
207 	tty->disc_data = NULL;  in n_hdlc_tty_close()
210 	wake_up_interruptible(&tty->read_wait);  in n_hdlc_tty_close()
211 	wake_up_interruptible(&tty->write_wait);  in n_hdlc_tty_close()
226 static int n_hdlc_tty_open(struct tty_struct *tty)  in n_hdlc_tty_open()  argument
228 	struct n_hdlc *n_hdlc = tty->disc_data;  in n_hdlc_tty_open()
230 	pr_debug("%s() called (device=%s)\n", __func__, tty->name);  in n_hdlc_tty_open()
244 	tty->disc_data = n_hdlc;  in n_hdlc_tty_open()
245 	tty->receive_room = 65536;  in n_hdlc_tty_open()
248 	set_bit(TTY_NO_WRITE_SPLIT, &tty->flags);  in n_hdlc_tty_open()
251 	tty_driver_flush_buffer(tty);  in n_hdlc_tty_open()
266 static void n_hdlc_send_frames(struct n_hdlc *n_hdlc, struct tty_struct *tty)  in n_hdlc_send_frames()  argument
289 		set_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);  in n_hdlc_send_frames()
290 		actual = tty->ops->write(tty, tbuf->buf, tbuf->count);  in n_hdlc_send_frames()
309 			wake_up_interruptible(&tty->write_wait);  in n_hdlc_send_frames()
326 		clear_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);  in n_hdlc_send_frames()
343 static void n_hdlc_tty_wakeup(struct tty_struct *tty)  in n_hdlc_tty_wakeup()  argument
345 	struct n_hdlc *n_hdlc = tty->disc_data;  in n_hdlc_tty_wakeup()
347 	n_hdlc_send_frames(n_hdlc, tty);  in n_hdlc_tty_wakeup()
360 static void n_hdlc_tty_receive(struct tty_struct *tty, const __u8 *data,  in n_hdlc_tty_receive()  argument
363 	register struct n_hdlc *n_hdlc = tty->disc_data;  in n_hdlc_tty_receive()
404 	wake_up_interruptible(&tty->read_wait);  in n_hdlc_tty_receive()
405 	if (tty->fasync != NULL)  in n_hdlc_tty_receive()
406 		kill_fasync(&tty->fasync, SIGIO, POLL_IN);  in n_hdlc_tty_receive()
421 static ssize_t n_hdlc_tty_read(struct tty_struct *tty, struct file *file,  in n_hdlc_tty_read()  argument
425 	struct n_hdlc *n_hdlc = tty->disc_data;  in n_hdlc_tty_read()
435 	add_wait_queue(&tty->read_wait, &wait);  in n_hdlc_tty_read()
438 		if (test_bit(TTY_OTHER_CLOSED, &tty->flags)) {  in n_hdlc_tty_read()
452 		if (tty_io_nonblock(tty, file)) {  in n_hdlc_tty_read()
465 	remove_wait_queue(&tty->read_wait, &wait);  in n_hdlc_tty_read()
514 static ssize_t n_hdlc_tty_write(struct tty_struct *tty, struct file *file,  in n_hdlc_tty_write()  argument
517 	struct n_hdlc *n_hdlc = tty->disc_data;  in n_hdlc_tty_write()
534 	add_wait_queue(&tty->write_wait, &wait);  in n_hdlc_tty_write()
543 		if (tty_io_nonblock(tty, file)) {  in n_hdlc_tty_write()
556 	remove_wait_queue(&tty->write_wait, &wait);  in n_hdlc_tty_write()
565 		n_hdlc_send_frames(n_hdlc, tty);  in n_hdlc_tty_write()
581 static int n_hdlc_tty_ioctl(struct tty_struct *tty, struct file *file,  in n_hdlc_tty_ioctl()  argument
584 	struct n_hdlc *n_hdlc = tty->disc_data;  in n_hdlc_tty_ioctl()
613 		count = tty_chars_in_buffer(tty);  in n_hdlc_tty_ioctl()
628 			flush_tx_queue(tty);  in n_hdlc_tty_ioctl()
633 		error = n_tty_ioctl_helper(tty, file, cmd, arg);  in n_hdlc_tty_ioctl()
650 static __poll_t n_hdlc_tty_poll(struct tty_struct *tty, struct file *filp,  in n_hdlc_tty_poll()  argument
653 	struct n_hdlc *n_hdlc = tty->disc_data;  in n_hdlc_tty_poll()
663 	poll_wait(filp, &tty->read_wait, wait);  in n_hdlc_tty_poll()
664 	poll_wait(filp, &tty->write_wait, wait);  in n_hdlc_tty_poll()
669 	if (test_bit(TTY_OTHER_CLOSED, &tty->flags))  in n_hdlc_tty_poll()
673 	if (!tty_is_writelocked(tty) &&  in n_hdlc_tty_poll()