[PATCH 5/6] nvme: track subsystems

[Keith Busch]

On Mon, Jun 19, 2017 at 11:57:53AM +0200, Christoph Hellwig wrote:
> This adds a new nvme_subsystem structure so that we can track multiple
> controllers that belong to a single subsystem.  For now we only use it
> to store the NQN, and to check that we don't have duplicate NQNs unless
> the involved subsystems support multiple controllers.

Looks good.

Reviewed-by: Keith Busch <keith.busch at intel.com>