#ifdef BOTHER
/* If the user asked for a precise weird speed give a precise weird
- answer. If they asked for a Bfoo speed they many have problems
+ answer. If they asked for a Bfoo speed they may have problems
digesting non-exact replies so fuzz a bit */
if ((termios->c_cflag & CBAUD) == BOTHER)
}
#endif
-/**
- * send_prio_char - send priority character
- *
- * Send a high priority character to the tty even if stopped
- *
- * Locking: none for xchar method, write ordering for write method.
- */
-
-static int send_prio_char(struct tty_struct *tty, char ch)
-{
- int was_stopped = tty->stopped;
-
- if (tty->ops->send_xchar) {
- tty->ops->send_xchar(tty, ch);
- return 0;
- }
-
- if (tty_write_lock(tty, 0) < 0)
- return -ERESTARTSYS;
-
- if (was_stopped)
- start_tty(tty);
- tty->ops->write(tty, &ch, 1);
- if (was_stopped)
- stop_tty(tty);
- tty_write_unlock(tty);
- return 0;
-}
-
/**
* tty_change_softcar - carrier change ioctl helper
* @tty: tty to update
return retval;
switch (arg) {
case TCOOFF:
+ spin_lock_irq(&tty->flow_lock);
if (!tty->flow_stopped) {
tty->flow_stopped = 1;
- stop_tty(tty);
+ __stop_tty(tty);
}
+ spin_unlock_irq(&tty->flow_lock);
break;
case TCOON:
+ spin_lock_irq(&tty->flow_lock);
if (tty->flow_stopped) {
tty->flow_stopped = 0;
- start_tty(tty);
+ __start_tty(tty);
}
+ spin_unlock_irq(&tty->flow_lock);
break;
case TCIOFF:
+ down_read(&tty->termios_rwsem);
if (STOP_CHAR(tty) != __DISABLED_CHAR)
- return send_prio_char(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 send_prio_char(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)