{
int ret = 0;
- down_write(&tty->termios_rwsem);
+ mutex_lock(&tty->throttle_mutex);
if (!test_bit(TTY_THROTTLED, &tty->flags)) {
if (tty->flow_change != TTY_THROTTLE_SAFE)
ret = 1;
tty->ops->throttle(tty);
}
}
- up_write(&tty->termios_rwsem);
+ mutex_unlock(&tty->throttle_mutex);
return ret;
}
{
int ret = 0;
- down_write(&tty->termios_rwsem);
+ mutex_lock(&tty->throttle_mutex);
if (test_bit(TTY_THROTTLED, &tty->flags)) {
if (tty->flow_change != TTY_UNTHROTTLE_SAFE)
ret = 1;
tty->ops->unthrottle(tty);
}
}
- up_write(&tty->termios_rwsem);
+ mutex_unlock(&tty->throttle_mutex);
return ret;
}