From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peter Hurley Subject: [PATCH v4 15/24] n_tty: Reset lnext if canonical mode changes Date: Sat, 15 Jun 2013 09:14:27 -0400 Message-ID: <1371302076-4688-16-git-send-email-peter@hurleysoftware.com> References: <1366039168-8510-1-git-send-email-peter@hurleysoftware.com> <1371302076-4688-1-git-send-email-peter@hurleysoftware.com> Return-path: In-Reply-To: <1371302076-4688-1-git-send-email-peter@hurleysoftware.com> Sender: linux-kernel-owner@vger.kernel.org To: Greg Kroah-Hartman Cc: linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org, Jiri Slaby , Peter Hurley List-Id: linux-serial@vger.kernel.org lnext escapes the next input character as a literal, and must be reset when canonical mode changes (to avoid misinterpreting a special character as a literal if canonical mode is changed back again). lnext is specifically not reset on a buffer flush so as to avoid misinterpreting the next input character as a special character. Signed-off-by: Peter Hurley --- drivers/tty/n_tty.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c index c7f71cb..e63beab 100644 --- a/drivers/tty/n_tty.c +++ b/drivers/tty/n_tty.c @@ -1574,6 +1574,7 @@ static void n_tty_set_termios(struct tty_struct *tty, struct ktermios *old) bitmap_zero(ldata->read_flags, N_TTY_BUF_SIZE); ldata->canon_head = ldata->read_tail; ldata->erasing = 0; + ldata->lnext = 0; } if (canon_change && !L_ICANON(tty) && read_cnt(ldata)) -- 1.8.1.2