Commit f95499c3 authored Jun 15, 2013 by Peter Hurley Committed by Greg Kroah-Hartman Jul 23, 2013

n_tty: Don't wait for buffer work in read() loop



User-space read() can run concurrently with receiving from device;
waiting for receive_buf() to complete is not required.

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent d1913e39

drivers/tty/n_tty.c

+0 −1

Original line number	Diff line number	Diff line
		@@ -1724,7 +1724,6 @@ static inline int input_available_p(struct tty_struct *tty, int amt)
		{
		struct n_tty_data *ldata = tty->disc_data;

		tty_flush_to_ldisc(tty);
		if (ldata->icanon && !L_EXTPROC(tty)) {
		if (ldata->canon_head != ldata->read_tail)
		return 1;