diff options
| -rw-r--r-- | drivers/tty/tty_ldisc.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/tty/tty_ldisc.c b/drivers/tty/tty_ldisc.c index a76c808afad..606c09568c0 100644 --- a/drivers/tty/tty_ldisc.c +++ b/drivers/tty/tty_ldisc.c @@ -424,6 +424,10 @@ EXPORT_SYMBOL_GPL(tty_ldisc_flush); * they are not on hot paths so a little discipline won't do * any harm. * + * The line discipline-related tty_struct fields are reset to + * prevent the ldisc driver from re-using stale information for + * the new ldisc instance. + * * Locking: takes termios_mutex */ @@ -432,6 +436,9 @@ static void tty_set_termios_ldisc(struct tty_struct *tty, int num) mutex_lock(&tty->termios_mutex); tty->termios->c_line = num; mutex_unlock(&tty->termios_mutex); + + tty->disc_data = NULL; + tty->receive_room = 0; } /** |