From mboxrd@z Thu Jan  1 00:00:00 1970
From: keith.busch@intel.com (Keith Busch)
Date: Wed, 3 Feb 2016 16:38:09 +0000
Subject: [PATCH] NVMe: do not touch sq door bell if nvmeq has been
 suspended
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On Wed, Feb 03, 2016@04:35:03PM +0000, Wenbo Wang wrote:
> For async io (executed by run_work worker) it should work. However for sync io in blk_mq_run_hw_queue, this seems not help, there is still a window.

Alright, for lack of a better way to sync a stopped queue, the driver's
indication looks like the best we can do at this point.