/**
* n_hdlc_tty_close - line discipline close
* @tty - pointer to tty info structure
*
* Called when the line discipline is changed to something
* else, the tty is closed, or the tty detects a hangup.
*/
static void n_hdlc_tty_close(struct tty_struct *tty)
{
struct n_hdlc *n_hdlc = tty2n_hdlc (tty);
if (debuglevel >= DEBUG_LEVEL_INFO)
printk("%s(%d)n_hdlc_tty_close() called\n",__FILE__,__LINE__);
if (n_hdlc != NULL) {
if (n_hdlc->magic != HDLC_MAGIC) {
printk (KERN_WARNING"n_hdlc: trying to close unopened tty!\n");
return;
}
#if defined(TTY_NO_WRITE_SPLIT)
clear_bit(TTY_NO_WRITE_SPLIT,&tty->flags);
#endif
tty->disc_data = NULL;
if (tty == n_hdlc->backup_tty)
n_hdlc->backup_tty = NULL;
if (tty != n_hdlc->tty)
return;
if (n_hdlc->backup_tty) {
n_hdlc->tty = n_hdlc->backup_tty;
} else {
n_hdlc_release (n_hdlc);
}
}
if (debuglevel >= DEBUG_LEVEL_INFO)
printk("%s(%d)n_hdlc_tty_close() success\n",__FILE__,__LINE__);
} /* end of n_hdlc_tty_close() */
static void vl_sync_release_port(struct vl_sync_port *port)
{
unsigned long flags;
pr_debug("VL_SYNC[%d]:release\n", port->line);
/* Ensure that the process is not hanging on select()/poll() */
wake_up_interruptible (&port->read_wait);
wake_up_interruptible (&port->write_wait);
// if (port->wait_closing)
// vl_sync_wait_until_send(port);
n_hdlc_release(port->n_hdlc);
port->n_hdlc = NULL;
/* clear open flag */
spin_lock_irqsave(&port->ctrl_lock, flags);
port->flags &= ~FLAG_OPEN;
spin_unlock_irqrestore(&port->ctrl_lock, flags);
return;
}