[PATCH v4] nvme: fix corruption for passthrough meta/data

[Christoph Hellwig]

On Fri, Oct 13, 2023 at 10:44:58AM +0530, Kanchan Joshi wrote:
> Changes since v3:
> - Block only unprivileged user

That's not really what at least I had in mind.  I'd much rather
completely disable unprivileged passthrough for now as an easy
backportable patch.  And then only re-enable it later in a way
where it does require using SGLs for all data transfers.