[PATCH 2/2] blk-mq: simplify blk_mq_realloc_tag_set_tags

[Christoph Hellwig <hch@lst.de>]

Use set->nr_hw_queues for the current number of tags, and remove the
duplicate set->nr_hw_queues update in the caller.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 block/blk-mq.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/block/blk-mq.c b/block/blk-mq.c
index 8c630dbdf107e..9fa0b9a1435f2 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -4381,11 +4381,11 @@ static void blk_mq_update_queue_map(struct blk_mq_tag_set *set)
 }
 
 static int blk_mq_realloc_tag_set_tags(struct blk_mq_tag_set *set,
-				  int cur_nr_hw_queues, int new_nr_hw_queues)
+				       int new_nr_hw_queues)
 {
 	struct blk_mq_tags **new_tags;
 
-	if (cur_nr_hw_queues >= new_nr_hw_queues)
+	if (set->nr_hw_queues >= new_nr_hw_queues)
 		return 0;
 
 	new_tags = kcalloc_node(new_nr_hw_queues, sizeof(struct blk_mq_tags *),
@@ -4394,7 +4394,7 @@ static int blk_mq_realloc_tag_set_tags(struct blk_mq_tag_set *set,
 		return -ENOMEM;
 
 	if (set->tags)
-		memcpy(new_tags, set->tags, cur_nr_hw_queues *
+		memcpy(new_tags, set->tags, set->nr_hw_queues *
 		       sizeof(*set->tags));
 	kfree(set->tags);
 	set->tags = new_tags;
@@ -4710,11 +4710,9 @@ static void __blk_mq_update_nr_hw_queues(struct blk_mq_tag_set *set,
 	}
 
 	prev_nr_hw_queues = set->nr_hw_queues;
-	if (blk_mq_realloc_tag_set_tags(set, set->nr_hw_queues, nr_hw_queues) <
-	    0)
+	if (blk_mq_realloc_tag_set_tags(set, nr_hw_queues) < 0)
 		goto reregister;
 
-	set->nr_hw_queues = nr_hw_queues;
 fallback:
 	blk_mq_update_queue_map(set);
 	list_for_each_entry(q, &set->tag_list, tag_set_list) {
-- 
2.30.2