Commit c72f527c authored Jul 22, 2008 by Paul Fulghum Committed by Linus Torvalds Jul 22, 2008

n_hdlc: honor O_NONBLOCK on write



Make n_hdlc line discipline honor the O_NONBLOCK file flag on write.

Signed-off-by: Paul Fulghum <paulkf@microgate.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent 768aec0b

drivers/char/n_hdlc.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -677,6 +677,10 @@ static ssize_t n_hdlc_tty_write(struct tty_struct tty, struct file file,
		/* Allocate transmit buffer */
		/* sleep until transmit buffer available */
		while (!(tbuf = n_hdlc_buf_get(&n_hdlc->tx_free_buf_list))) {
		if (file->f_flags & O_NONBLOCK) {
		error = -EAGAIN;
		break;
		}
		schedule();

		n_hdlc = tty2n_hdlc (tty);