[PATCH 02/10] blk-mq: remove useless checkings from blk_mq_update_nr_requests()

[Yu Kuai]

From: Yu Kuai <yukuai3@xxxxxxxxxx>

1) queue_requests_store() is the only caller of
blk_mq_update_nr_requests(), where queue is already freezed, no need to
check mq_freeze_depth;
2) q->tag_set must be set for request_based device, and queue_is_mq() is
already checked in blk_mq_queue_attr_visible(), no need to check
q->tag_set.

Signed-off-by: Yu Kuai <yukuai3@xxxxxxxxxx>
---
 block/blk-mq.c | 9 +--------
 1 file changed, 1 insertion(+), 8 deletions(-)

diff --git a/block/blk-mq.c b/block/blk-mq.c
index 9c68749124c6..ea2995d4a917 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -4921,21 +4921,14 @@ int blk_mq_update_nr_requests(struct request_queue *q, unsigned int nr)
 {
 	struct blk_mq_tag_set *set = q->tag_set;
 	struct blk_mq_hw_ctx *hctx;
-	int ret;
 	unsigned long i;
-
-	if (WARN_ON_ONCE(!q->mq_freeze_depth))
-		return -EINVAL;
-
-	if (!set)
-		return -EINVAL;
+	int ret = 0;
 
 	if (q->nr_requests == nr)
 		return 0;
 
 	blk_mq_quiesce_queue(q);
 
-	ret = 0;
 	queue_for_each_hw_ctx(q, hctx, i) {
 		if (!hctx->tags)
 			continue;
-- 
2.39.2