Re: [PATCH v4 03/11] blk-mq: introduce blk_mq_quiesce_queue_nowait()
From: Bart Van Assche <hidden>
Date: 2017-06-05 21:29:23
On Mon, 2017-06-05 at 23:59 +0800, Ming Lei wrote:
quoted hunk ↗ jump to hunk
This patch introduces blk_mq_quiesce_queue_nowait() so that we can workaround mpt3sas for quiescing its queue. =20 Once mpt3sas is fixed, we can remove this helper. =20 Signed-off-by: Ming Lei <redacted> --- include/linux/blk-mq.h | 8 ++++++++ 1 file changed, 8 insertions(+) =20diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h index 1e480015d172..13d1196f492f 100644 --- a/include/linux/blk-mq.h +++ b/include/linux/blk-mq.h@@ -266,6 +266,14 @@ int blk_mq_map_queues(struct blk_mq_tag_set *set); void blk_mq_update_nr_hw_queues(struct blk_mq_tag_set *set, int nr_hw_qu=
eues);
=20
/*
+ * FIXME: this helper is just for working around mpt3sas.
+ */
+static inline void blk_mq_quiesce_queue_nowait(struct request_queue *q)
+{
+ blk_mq_stop_hw_queues(q);
+}
+
+/*
* Driver command data is immediately after the request. So subtract req=uest
* size to get back to the original request, add request size to get the=
PDU.
*/
Reviewed-by: Bart Van Assche <redacted>=