[PATCH v2] nvme: add vectored-io support for user-passthru

[Christoph Hellwig]

On Wed, Feb 02, 2022 at 12:22:53PM +0530, Kanchan Joshi wrote:
> Not many admin commands are buffer-heavy and likely to have lower
> invocation frequency too, so I did not think of adding support.
> If you foresee this to be useful for some (maybe log-page or
> fw-download), I can fold that in.

Just add this rationale to the commit message so that we document it for
future generations.