Re: [PATCH 9/9] vfio: Remove calls to vfio_group_add_container_user()

[Christoph Hellwig <hch@xxxxxx>]

On Tue, Apr 12, 2022 at 12:53:36PM -0300, Jason Gunthorpe wrote:
> +	if (WARN_ON(!READ_ONCE(vdev->open_count)))
> +		return -EINVAL;

I think all the WARN_ON()s in this patch need to be WARN_ON_ONCE,
otherwise there will be too many backtraces to be useful if a driver
ever gets the API wrong.

Otherwise looks good:

Reviewed-by: Christoph Hellwig <hch@xxxxxx>