From: Chao Leng <lengchao@huawei.com>
To: <linux-nvme@lists.infradead.org>
Cc: <kbusch@kernel.org>, <axboe@fb.com>, <hch@lst.de>,
<sagi@grimberg.me>, <linux-block@vger.kernel.org>,
<axboe@kernel.dk>
Subject: [PATCH v5 2/3] nvme-fabrics: avoid double request completion for nvmf_fail_nonready_command
Date: Mon, 1 Feb 2021 11:49:39 +0800 [thread overview]
Message-ID: <20210201034940.18891-3-lengchao@huawei.com> (raw)
In-Reply-To: <20210201034940.18891-1-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 | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/nvme/host/fabrics.c b/drivers/nvme/host/fabrics.c
index 72ac00173500..cedf9b318986 100644
--- a/drivers/nvme/host/fabrics.c
+++ b/drivers/nvme/host/fabrics.c
@@ -554,7 +554,7 @@ blk_status_t nvmf_fail_nonready_command(struct nvme_ctrl *ctrl,
return BLK_STS_RESOURCE;
nvme_req(rq)->status = NVME_SC_HOST_PATH_ERROR;
- blk_mq_start_request(rq);
+ blk_mq_set_request_complete(rq);
nvme_complete_rq(rq);
return BLK_STS_OK;
}
--
2.16.4
WARNING: multiple messages have this Message-ID (diff)
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 v5 2/3] nvme-fabrics: avoid double request completion for nvmf_fail_nonready_command
Date: Mon, 1 Feb 2021 11:49:39 +0800 [thread overview]
Message-ID: <20210201034940.18891-3-lengchao@huawei.com> (raw)
In-Reply-To: <20210201034940.18891-1-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 | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/nvme/host/fabrics.c b/drivers/nvme/host/fabrics.c
index 72ac00173500..cedf9b318986 100644
--- a/drivers/nvme/host/fabrics.c
+++ b/drivers/nvme/host/fabrics.c
@@ -554,7 +554,7 @@ blk_status_t nvmf_fail_nonready_command(struct nvme_ctrl *ctrl,
return BLK_STS_RESOURCE;
nvme_req(rq)->status = NVME_SC_HOST_PATH_ERROR;
- blk_mq_start_request(rq);
+ blk_mq_set_request_complete(rq);
nvme_complete_rq(rq);
return BLK_STS_OK;
}
--
2.16.4
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next prev parent reply other threads:[~2021-02-01 3:50 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-01 3:49 [PATCH v5 0/3] avoid double request completion and IO error Chao Leng
2021-02-01 3:49 ` Chao Leng
2021-02-01 3:49 ` [PATCH v5 1/3] blk-mq: introduce blk_mq_set_request_complete Chao Leng
2021-02-01 3:49 ` Chao Leng
2021-02-04 15:27 ` Jens Axboe
2021-02-04 15:27 ` Jens Axboe
2021-02-04 15:30 ` Christoph Hellwig
2021-02-04 15:30 ` Christoph Hellwig
2021-02-04 15:32 ` Jens Axboe
2021-02-04 15:32 ` Jens Axboe
2021-02-04 15:36 ` Christoph Hellwig
2021-02-04 15:36 ` Christoph Hellwig
2021-02-04 15:41 ` Jens Axboe
2021-02-04 15:41 ` Jens Axboe
2021-02-01 3:49 ` Chao Leng [this message]
2021-02-01 3:49 ` [PATCH v5 2/3] nvme-fabrics: avoid double request completion for nvmf_fail_nonready_command Chao Leng
2021-02-01 3:49 ` [PATCH v5 3/3] nvme-rdma: avoid IO error for nvme native multipath Chao Leng
2021-02-01 3:49 ` Chao Leng
2021-02-03 16:14 ` [PATCH v5 0/3] avoid double request completion and IO error Christoph Hellwig
2021-02-03 16:14 ` Christoph Hellwig
2021-02-03 22:22 ` Sagi Grimberg
2021-02-03 22:22 ` Sagi Grimberg
2021-02-04 5:56 ` Chao Leng
2021-02-04 5:56 ` Chao Leng
2021-02-04 8:04 ` Christoph Hellwig
2021-02-04 8:04 ` Christoph Hellwig
2021-02-05 2:02 ` Chao Leng
2021-02-05 2:02 ` Chao Leng
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