- /* See if packet mode change of state. */
- if (tty->link && tty->link->packet) {
- int extproc = (old_termios.c_lflag & EXTPROC) |
- (tty->termios.c_lflag & EXTPROC);
- int old_flow = ((old_termios.c_iflag & IXON) &&
- (old_termios.c_cc[VSTOP] == '\023') &&
- (old_termios.c_cc[VSTART] == '\021'));
- int new_flow = (I_IXON(tty) &&
- STOP_CHAR(tty) == '\023' &&
- START_CHAR(tty) == '\021');
- if ((old_flow != new_flow) || extproc) {
- spin_lock_irqsave(&tty->ctrl_lock, flags);
- if (old_flow != new_flow) {
- tty->ctrl_status &= ~(TIOCPKT_DOSTOP | TIOCPKT_NOSTOP);
- if (new_flow)
- tty->ctrl_status |= TIOCPKT_DOSTOP;
- else
- tty->ctrl_status |= TIOCPKT_NOSTOP;
- }
- if (extproc)
- tty->ctrl_status |= TIOCPKT_IOCTL;
- spin_unlock_irqrestore(&tty->ctrl_lock, flags);
- wake_up_interruptible(&tty->link->read_wait);
- }
- }
-