[PATCH 2/6] nvme: read the subsystem NQN from Identify Controller

[Keith Busch]

On Mon, Jun 19, 2017 at 11:57:50AM +0200, Christoph Hellwig wrote:
> NVMe 1.2.1 or later requires controllers to provide a subsystem NQN in the
> Identify controller data structures.  Use this NQN for the subsysnqn
> sysfs attribute by storing it in the nvme_ctrl structure after verifying
> it.  For older controllers we generate a "fake" NQN per non-normative
> text in the NVMe 1.3 spec.

Looks good.

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