diff options
| -rw-r--r-- | drivers/tty/tty_ioctl.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/drivers/tty/tty_ioctl.c b/drivers/tty/tty_ioctl.c index ad9120d1c0f1..62380ccf70fb 100644 --- a/drivers/tty/tty_ioctl.c +++ b/drivers/tty/tty_ioctl.c @@ -1164,17 +1164,21 @@ int n_tty_ioctl_helper(struct tty_struct *tty, struct file *file, spin_unlock_irq(&tty->flow_lock); break; case TCIOFF: + down_read(&tty->termios_rwsem); if (STOP_CHAR(tty) != __DISABLED_CHAR) - return tty_send_xchar(tty, STOP_CHAR(tty)); + retval = tty_send_xchar(tty, STOP_CHAR(tty)); + up_read(&tty->termios_rwsem); break; case TCION: + down_read(&tty->termios_rwsem); if (START_CHAR(tty) != __DISABLED_CHAR) - return tty_send_xchar(tty, START_CHAR(tty)); + retval = tty_send_xchar(tty, START_CHAR(tty)); + up_read(&tty->termios_rwsem); break; default: return -EINVAL; } - return 0; + return retval; case TCFLSH: retval = tty_check_change(tty); if (retval) |