[PATCH v3] nvme: add quirk to force medium priority for SQ creation

[Christoph Hellwig]

On Tue, May 08, 2018 at 10:25:15AM -0600, Jens Axboe wrote:
> Some P3100 drives have a bug where they think WRRU (weighted round
> robin) is always enabled, even though the host doesn't set it. Since
> they think it's enabled, they also look at the submission queue
> creation priority. We used to set that to MEDIUM by default,
> but that was removed in commit 81c1cd98351b. This causes various
> issues on that drive. Add a quick to still set MEDIUM priority
> for that controller.

And this really isn't something that could be fixed with a trivial
firmware uptodate?  I'd really hate to pile on hacks like this if we
can somehow avoid it.