On Mon, Sep 26, 2016 at 11:26:50AM -0700, Bart Van Assche wrote:

Ensure that all ongoing dm_mq_queue_rq() and dm_mq_requeue_request()
calls have stopped before setting the "queue stopped" flag. This
allows to remove the "queue stopped" test from dm_mq_queue_rq() and
dm_mq_requeue_request(). This patch fixes a race condition because
dm_mq_queue_rq() is called without holding the queue lock and hence
BLK_MQ_S_STOPPED can be set at any time while dm_mq_queue_rq() is
in progress.

Signed-off-by: Bart Van Assche <redacted>
Cc: Mike Snitzer <redacted>
---

Looks good,
Reviewed-by: Johannes Thumshirn <redacted>

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