nvme cleanups in preparation for the multipath code

To: Keith Busch <keith.busch@xxxxxxxxx>, Sagi Grimberg <sagi@xxxxxxxxxxx>
Subject: nvme cleanups in preparation for the multipath code
From: Christoph Hellwig <hch@xxxxxx>
Date: Thu, 2 Nov 2017 21:28:50 +0300
Cc: Jens Axboe <axboe@xxxxxxxxx>, Hannes Reinecke <hare@xxxxxxx>, Johannes Thumshirn <jthumshirn@xxxxxxx>, linux-nvme@xxxxxxxxxxxxxxxxxxx, linux-block@xxxxxxxxxxxxxxx

Hi all,

below are a couple cleanup patches to prepare for the next version
of the nvme multipath code.

Follow-Ups:
- [PATCH 6/6] nvme: split __nvme_revalidate_disk
  - From: Christoph Hellwig
- [PATCH 5/6] nvme: set the chunk size before freezing the queue
  - From: Christoph Hellwig
- [PATCH 4/6] nvme: don't pass struct nvme_ns to nvme_config_discard
  - From: Christoph Hellwig
- [PATCH 3/6] nvme: don't pass struct nvme_ns to nvme_init_integrity
  - From: Christoph Hellwig
- [PATCH 2/6] nvme: always unregister the integrity profile in __nvme_revalidate_disk
  - From: Christoph Hellwig
- [PATCH 1/6] nvme: move the dying queue check from cancel to completion
  - From: Christoph Hellwig