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.