diff options
Diffstat (limited to 'kernel/drivers/tty/tty_ldisc.c')
| -rw-r--r-- | kernel/drivers/tty/tty_ldisc.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/kernel/drivers/tty/tty_ldisc.c b/kernel/drivers/tty/tty_ldisc.c index 629e3c865..9bee25cfa 100644 --- a/kernel/drivers/tty/tty_ldisc.c +++ b/kernel/drivers/tty/tty_ldisc.c @@ -417,6 +417,10 @@ 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_rwsem */ @@ -425,6 +429,9 @@ static void tty_set_termios_ldisc(struct tty_struct *tty, int num) down_write(&tty->termios_rwsem); tty->termios.c_line = num; up_write(&tty->termios_rwsem); + + tty->disc_data = NULL; + tty->receive_room = 0; } /** |