[1/2] nvme-auth: unlock mutex in one place only

[Markus Elfring]

> The subject is already in the imperative voice, and there's really
> nothing furthur to elaborate that would help justify this patch's
> inclusion. I'm not sure what point you're trying to make here.

Does the concrete requirement for the usage of “imperative mood”
mean also that a reasonable subject would be insufficient alone
without a corresponding description (or “change log”)?

Regards,
Markus