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From: Yu Kuai <yukuai3@huawei.com>
To: <axboe@kernel.dk>, <josef@toxicpanda.com>, <ming.lei@redhat.com>
Cc: <linux-block@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
	<nbd@other.debian.org>, <yukuai3@huawei.com>,
	<yi.zhang@huawei.com>
Subject: [PATCH v4 6/6] nbd: don't start request if nbd_queue_rq() failed
Date: Tue, 7 Sep 2021 22:01:54 +0800	[thread overview]
Message-ID: <20210907140154.2134091-7-yukuai3@huawei.com> (raw)
In-Reply-To: <20210907140154.2134091-1-yukuai3@huawei.com>

Currently, blk_mq_end_request() will be called if nbd_queue_rq()
failed, thus start request in such situation is useless.

Signed-off-by: Yu Kuai <yukuai3@huawei.com>
---
 drivers/block/nbd.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index 807c8cbccaae..122e49ae86fb 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -938,7 +938,6 @@ static int nbd_handle_cmd(struct nbd_cmd *cmd, int index)
 	if (!refcount_inc_not_zero(&nbd->config_refs)) {
 		dev_err_ratelimited(disk_to_dev(nbd->disk),
 				    "Socks array is empty\n");
-		blk_mq_start_request(req);
 		return -EINVAL;
 	}
 	config = nbd->config;
@@ -947,7 +946,6 @@ static int nbd_handle_cmd(struct nbd_cmd *cmd, int index)
 		dev_err_ratelimited(disk_to_dev(nbd->disk),
 				    "Attempted send on invalid socket\n");
 		nbd_config_put(nbd);
-		blk_mq_start_request(req);
 		return -EINVAL;
 	}
 	cmd->status = BLK_STS_OK;
@@ -971,7 +969,6 @@ static int nbd_handle_cmd(struct nbd_cmd *cmd, int index)
 			 */
 			sock_shutdown(nbd);
 			nbd_config_put(nbd);
-			blk_mq_start_request(req);
 			return -EIO;
 		}
 		goto again;
-- 
2.31.1


  parent reply	other threads:[~2021-09-07 13:52 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-07 14:01 [PATCH v4 0/6] handle unexpected message from server Yu Kuai
2021-09-07 14:01 ` [PATCH v4 1/6] blk-mq: export two symbols to get request by tag Yu Kuai
2021-09-07 14:01 ` [PATCH v4 2/6] nbd: convert to use blk_mq_find_and_get_req() Yu Kuai
2021-09-08  7:30   ` Ming Lei
2021-09-08  7:37     ` yukuai (C)
2021-09-08  8:00       ` Ming Lei
2021-09-08  8:29         ` yukuai (C)
2021-09-08  9:27           ` Ming Lei
2021-09-08 11:03             ` yukuai (C)
2021-09-07 14:01 ` [PATCH v4 3/6] nbd: don't handle response without a corresponding request message Yu Kuai
2021-09-07 14:01 ` [PATCH v4 4/6] nbd: make sure request completion won't concurrent Yu Kuai
2021-09-07 14:01 ` [PATCH v4 5/6] nbd: check sock index in nbd_read_stat() Yu Kuai
2021-09-07 14:01 ` Yu Kuai [this message]
2021-09-09  6:41   ` [PATCH v4 6/6] nbd: don't start request if nbd_queue_rq() failed Christoph Hellwig

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