From: Chao Leng <lengchao@huawei.com>
To: <linux-nvme@lists.infradead.org>
Cc: axboe@kernel.dk, linux-block@vger.kernel.org, sagi@grimberg.me,
axboe@fb.com, kbusch@kernel.org, hch@lst.de
Subject: [PATCH v3 3/5] nvme-fabrics: avoid double request completion for nvmf_fail_nonready_command
Date: Thu, 21 Jan 2021 15:03:28 +0800 [thread overview]
Message-ID: <20210121070330.19701-4-lengchao@huawei.com> (raw)
In-Reply-To: <20210121070330.19701-1-lengchao@huawei.com>
When reconnect, the request may be completed with NVME_SC_HOST_PATH_ERROR
in nvmf_fail_nonready_command. The state of request will be changed to
MQ_RQ_IN_FLIGHT before call nvme_complete_rq. If free the request
asynchronously such as in nvme_submit_user_cmd, in extreme scenario
the request may be completed again in tear down process.
nvmf_fail_nonready_command do not need calling blk_mq_start_request
before complete the request. nvmf_fail_nonready_command should set
the state of request to MQ_RQ_COMPLETE before complete the request.
Signed-off-by: Chao Leng <lengchao@huawei.com>
---
drivers/nvme/host/fabrics.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/drivers/nvme/host/fabrics.c b/drivers/nvme/host/fabrics.c
index 72ac00173500..874e4320e214 100644
--- a/drivers/nvme/host/fabrics.c
+++ b/drivers/nvme/host/fabrics.c
@@ -553,9 +553,7 @@ blk_status_t nvmf_fail_nonready_command(struct nvme_ctrl *ctrl,
!blk_noretry_request(rq) && !(rq->cmd_flags & REQ_NVME_MPATH))
return BLK_STS_RESOURCE;
- nvme_req(rq)->status = NVME_SC_HOST_PATH_ERROR;
- blk_mq_start_request(rq);
- nvme_complete_rq(rq);
+ nvme_complete_failed_req(rq);
return BLK_STS_OK;
}
EXPORT_SYMBOL_GPL(nvmf_fail_nonready_command);
--
2.16.4
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next prev parent reply other threads:[~2021-01-21 7:04 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-21 7:03 [PATCH v3 0/5] avoid double request completion and IO error Chao Leng
2021-01-21 7:03 ` [PATCH v3 1/5] blk-mq: introduce blk_mq_set_request_complete Chao Leng
2021-01-21 8:40 ` Christoph Hellwig
2021-01-22 1:46 ` Chao Leng
2021-01-21 7:03 ` [PATCH v3 2/5] nvme-core: introduce complete failed request Chao Leng
2021-01-21 8:41 ` Christoph Hellwig
2021-01-22 1:46 ` Chao Leng
2021-01-21 7:03 ` Chao Leng [this message]
2021-01-21 8:58 ` [PATCH v3 3/5] nvme-fabrics: avoid double request completion for nvmf_fail_nonready_command Hannes Reinecke
2021-01-21 9:00 ` Christoph Hellwig
2021-01-21 9:27 ` Hannes Reinecke
2021-01-22 1:50 ` Chao Leng
2021-01-22 1:48 ` Chao Leng
2021-01-21 7:03 ` [PATCH v3 4/5] nvme-rdma: avoid IO error for nvme native multipath Chao Leng
2021-01-21 7:03 ` [PATCH v3 5/5] nvme-fc: " Chao Leng
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