block dangerous passthrough operation

[Christoph Hellwig]

On Wed, Nov 16, 2022 at 07:13:22PM +0530, Kanchan Joshi wrote:
> I see, good to know. I am still missing something.
> This series is on top of nvme-6.2, since nvme_cmd_allowed did not exist
> earlier.
> In that case having this series or not having - gives the same effect,
> no?

Yes, no change due to the series introducing nvme_cmd_allowed.
It is just a convenient place to put the checks.