160 static void flush_rx_queue(struct tty_struct *tty)  in flush_rx_queue()  argument
162 	struct n_hdlc *n_hdlc = tty->disc_data;  in flush_rx_queue()
169 static void flush_tx_queue(struct tty_struct *tty)  in flush_tx_queue()  argument
171 	struct n_hdlc *n_hdlc = tty->disc_data;  in flush_tx_queue()
195 static void n_hdlc_tty_close(struct tty_struct *tty)  in n_hdlc_tty_close()  argument
197 	struct n_hdlc *n_hdlc = tty->disc_data;  in n_hdlc_tty_close()
204 	clear_bit(TTY_NO_WRITE_SPLIT, &tty->flags);  in n_hdlc_tty_close()
206 	tty->disc_data = NULL;  in n_hdlc_tty_close()
209 	wake_up_interruptible(&tty->read_wait);  in n_hdlc_tty_close()
210 	wake_up_interruptible(&tty->write_wait);  in n_hdlc_tty_close()
225 static int n_hdlc_tty_open(struct tty_struct *tty)  in n_hdlc_tty_open()  argument
227 	struct n_hdlc *n_hdlc = tty->disc_data;  in n_hdlc_tty_open()
229 	pr_debug("%s() called (device=%s)\n", __func__, tty->name);  in n_hdlc_tty_open()
243 	tty->disc_data = n_hdlc;  in n_hdlc_tty_open()
244 	tty->receive_room = 65536;  in n_hdlc_tty_open()
247 	set_bit(TTY_NO_WRITE_SPLIT, &tty->flags);  in n_hdlc_tty_open()
250 	tty_driver_flush_buffer(tty);  in n_hdlc_tty_open()
265 static void n_hdlc_send_frames(struct n_hdlc *n_hdlc, struct tty_struct *tty)  in n_hdlc_send_frames()  argument
288 		set_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);  in n_hdlc_send_frames()
289 		actual = tty->ops->write(tty, tbuf->buf, tbuf->count);  in n_hdlc_send_frames()
308 			wake_up_interruptible(&tty->write_wait);  in n_hdlc_send_frames()
325 		clear_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);  in n_hdlc_send_frames()
342 static void n_hdlc_tty_wakeup(struct tty_struct *tty)  in n_hdlc_tty_wakeup()  argument
344 	struct n_hdlc *n_hdlc = tty->disc_data;  in n_hdlc_tty_wakeup()
346 	n_hdlc_send_frames(n_hdlc, tty);  in n_hdlc_tty_wakeup()
359 static void n_hdlc_tty_receive(struct tty_struct *tty, const __u8 *data,  in n_hdlc_tty_receive()  argument
362 	register struct n_hdlc *n_hdlc = tty->disc_data;  in n_hdlc_tty_receive()
403 	wake_up_interruptible(&tty->read_wait);  in n_hdlc_tty_receive()
404 	if (tty->fasync != NULL)  in n_hdlc_tty_receive()
405 		kill_fasync(&tty->fasync, SIGIO, POLL_IN);  in n_hdlc_tty_receive()
418 static ssize_t n_hdlc_tty_read(struct tty_struct *tty, struct file *file,  in n_hdlc_tty_read()  argument
421 	struct n_hdlc *n_hdlc = tty->disc_data;  in n_hdlc_tty_read()
426 	add_wait_queue(&tty->read_wait, &wait);  in n_hdlc_tty_read()
429 		if (test_bit(TTY_OTHER_CLOSED, &tty->flags)) {  in n_hdlc_tty_read()
460 		if (tty_io_nonblock(tty, file)) {  in n_hdlc_tty_read()
473 	remove_wait_queue(&tty->read_wait, &wait);  in n_hdlc_tty_read()
489 static ssize_t n_hdlc_tty_write(struct tty_struct *tty, struct file *file,  in n_hdlc_tty_write()  argument
492 	struct n_hdlc *n_hdlc = tty->disc_data;  in n_hdlc_tty_write()
509 	add_wait_queue(&tty->write_wait, &wait);  in n_hdlc_tty_write()
518 		if (tty_io_nonblock(tty, file)) {  in n_hdlc_tty_write()
531 	remove_wait_queue(&tty->write_wait, &wait);  in n_hdlc_tty_write()
540 		n_hdlc_send_frames(n_hdlc, tty);  in n_hdlc_tty_write()
556 static int n_hdlc_tty_ioctl(struct tty_struct *tty, struct file *file,  in n_hdlc_tty_ioctl()  argument
559 	struct n_hdlc *n_hdlc = tty->disc_data;  in n_hdlc_tty_ioctl()
588 		count = tty_chars_in_buffer(tty);  in n_hdlc_tty_ioctl()
603 			flush_tx_queue(tty);  in n_hdlc_tty_ioctl()
608 		error = n_tty_ioctl_helper(tty, file, cmd, arg);  in n_hdlc_tty_ioctl()
625 static __poll_t n_hdlc_tty_poll(struct tty_struct *tty, struct file *filp,  in n_hdlc_tty_poll()  argument
628 	struct n_hdlc *n_hdlc = tty->disc_data;  in n_hdlc_tty_poll()
638 	poll_wait(filp, &tty->read_wait, wait);  in n_hdlc_tty_poll()
639 	poll_wait(filp, &tty->write_wait, wait);  in n_hdlc_tty_poll()
644 	if (test_bit(TTY_OTHER_CLOSED, &tty->flags))  in n_hdlc_tty_poll()
648 	if (!tty_is_writelocked(tty) &&  in n_hdlc_tty_poll()