[PATCH 2/3] nvme: move get/put ctrl into dev open/release

[Christoph Hellwig]

On Thu, Sep 03, 2020 at 07:39:28PM -0700, Chaitanya Kulkarni wrote:
> Introduce nvme_dev_release ctrl file release callback and move ctrl get
> and put operations from target passthru into host core in ctrl open and
> release file operations respectively. This is needed to atomically
> get/put ctrl and get/put ctrl module refcount without using any locks.

Besides the comment from Logan:  this doesn't move as said in the
subject but adds a reference.  I think this should be patch 1 as it
is a fixed that will need backports further back.