From: Jinlong Chen <nickyc975@zju.edu.cn>
Date: Wed, 2 Nov 2022 02:52:29 +0000 (+0800)
Subject: blk-mq: improve error handling in blk_mq_alloc_rq_map()
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=7edfd68165b8dab8cde231728ff092a625469eb7;p=linux.git

blk-mq: improve error handling in blk_mq_alloc_rq_map()

Use goto-style error handling like we do elsewhere in the kernel.

Signed-off-by: Jinlong Chen <nickyc975@zju.edu.cn>
Link: https://lore.kernel.org/r/bbbc2d9b17b137798c7fb92042141ca4cbbc58cc.1667356813.git.nickyc975@zju.edu.cn
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---

diff --git a/block/blk-mq.c b/block/blk-mq.c
index bae6f81c39b35..d4824b53f6b20 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -3305,21 +3305,22 @@ static struct blk_mq_tags *blk_mq_alloc_rq_map(struct blk_mq_tag_set *set,
 	tags->rqs = kcalloc_node(nr_tags, sizeof(struct request *),
 				 GFP_NOIO | __GFP_NOWARN | __GFP_NORETRY,
 				 node);
-	if (!tags->rqs) {
-		blk_mq_free_tags(tags);
-		return NULL;
-	}
+	if (!tags->rqs)
+		goto err_free_tags;
 
 	tags->static_rqs = kcalloc_node(nr_tags, sizeof(struct request *),
 					GFP_NOIO | __GFP_NOWARN | __GFP_NORETRY,
 					node);
-	if (!tags->static_rqs) {
-		kfree(tags->rqs);
-		blk_mq_free_tags(tags);
-		return NULL;
-	}
+	if (!tags->static_rqs)
+		goto err_free_rqs;
 
 	return tags;
+
+err_free_rqs:
+	kfree(tags->rqs);
+err_free_tags:
+	blk_mq_free_tags(tags);
+	return NULL;
 }
 
 static int blk_mq_init_request(struct blk_mq_tag_set *set, struct request *rq,