block: save previous hardware queue count before udpate
diff mbox series

Message ID 20200404070844.GA17505@192.168.3.9
State New
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Series
  • block: save previous hardware queue count before udpate
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Commit Message

Weiping Zhang April 4, 2020, 7:08 a.m. UTC
blk_mq_realloc_tag_set_tags will update set->nr_hw_queues, so
save old set->nr_hw_queues before call this function.

Since set->nr_hw_queues has been updated in blk_mq_realloc_tag_set_tags,
no need set it again.

Signed-off-by: Weiping Zhang <zhangweiping@didiglobal.com>
---
 block/blk-mq.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

Patch
diff mbox series

diff --git a/block/blk-mq.c b/block/blk-mq.c
index f6291ceedee4..c86d1c81d3d6 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -3342,12 +3342,11 @@  static void __blk_mq_update_nr_hw_queues(struct blk_mq_tag_set *set,
 		blk_mq_sysfs_unregister(q);
 	}
 
+	prev_nr_hw_queues = set->nr_hw_queues;
 	if (blk_mq_realloc_tag_set_tags(set, set->nr_hw_queues, nr_hw_queues) <
 	    0)
 		goto reregister;
 
-	prev_nr_hw_queues = set->nr_hw_queues;
-	set->nr_hw_queues = nr_hw_queues;
 	blk_mq_update_queue_map(set);
 fallback:
 	list_for_each_entry(q, &set->tag_list, tag_set_list) {