Re: [PATCH 4/6] blk-mq: Update queue map when changing queue count

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diff --git a/block/blk-mq.c b/block/blk-mq.c
index a8e67a1..9b7ed03 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -2223,7 +2223,6 @@ static void blk_mq_queue_reinit(struct request_queue *q,
 	 * we should change hctx numa_node according to new topology (this
 	 * involves free and re-allocate memory, worthy doing?)
 	 */
-

This looks mis-placed.

 	blk_mq_map_swqueue(q, online_mask);

 	blk_mq_sysfs_register(q);
@@ -2481,6 +2480,11 @@ void blk_mq_update_nr_hw_queues(struct blk_mq_tag_set *set, int nr_hw_queues)
 		blk_mq_freeze_queue(q);

 	set->nr_hw_queues = nr_hw_queues;
+	if (set->ops->map_queues)
+		set->ops->map_queues(set);
+	else
+		blk_mq_map_queues(set);
+

Makes sense,

Reviewed-by: Sagi Grimberg <sagi@xxxxxxxxxxx>
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