[PATCH 2/6] nvme-pci: fix the freeze and quiesce for shutdown and reset case

[Keith Busch]

On Fri, Feb 02, 2018 at 03:00:45PM +0800, Jianchao Wang wrote:
> Currently, request queue will be frozen and quiesced for both reset
> and shutdown case. This will trigger ioq requests in RECONNECTING
> state which should be avoided to prepare for following patch.
> Just freeze request queue for shutdown case and drain all the resudual
> entered requests after controller has been shutdown.

Freezing is not just for shutdown. It's also used so
blk_mq_update_nr_hw_queues will work if the queue count changes across
resets.