Staging: hv: Cleanup blkvsc_open()

{

	struct block_device_context *blkdev = bdev->bd_disk->private_data;

	mutex_lock(&blkvsc_mutex);

	spin_lock(&blkdev->lock);

	if (!blkdev->users && blkdev->device_type == DVD_TYPE) {

		spin_unlock(&blkdev->lock);

		check_disk_change(bdev);

	spin_lock(&blkdev->lock);

	}

	blkdev->users++;

	spin_unlock(&blkdev->lock);

	mutex_unlock(&blkvsc_mutex);

	return 0;

}