dev_open (struct inode *inode, struct file *fd)
{
	struct dev_data		*dev = inode->i_private;
	int			value = -EBUSY;

	spin_lock_irq(&dev->lock);
	if (dev->state == STATE_DEV_DISABLED) {
		dev->ev_next = 0;
		dev->state = STATE_DEV_OPENED;
		fd->private_data = dev;
		get_dev (dev);
		value = 0;
	}
	spin_unlock_irq(&dev->lock);
	return value;
}
dev_open (struct inode *inode, struct file *fd)
{
	struct dev_data		*dev = inode->i_private;
	int			value = -EBUSY;

	spin_lock_irq(&dev->lock);
	if (dev->state == STATE_DEV_DISABLED) {
		dev->ev_next = 0;
		dev->state = STATE_DEV_OPENED;
		fd->private_data = dev;
		get_dev (dev);
		value = 0;
	}
	spin_unlock_irq(&dev->lock);
	return value;
}