> From: Liu, Yi L <yi.l....@intel.com>
> Sent: Wednesday, March 8, 2023 9:29 PM
>
> @@ -1114,6 +1114,10 @@ static long vfio_device_fops_unl_ioctl(struct file
> *filep,
>       struct vfio_device *device = df->device;
>       int ret;
> 
> +     /* Paired with smp_store_release() in vfio_device_group_open() */
> +     if (!smp_load_acquire(&df->access_granted))
> +             return -EINVAL;
> +

/* Paired with smp_store_release() right after vfio_device_open() is called */

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