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From: Yuanyuan Zhong <yzhong@purestorage.com>
To: kbusch@kernel.org, axboe@fb.com, hch@lst.de, sagi@grimberg.me
Cc: linux-nvme@lists.infradead.org, cachen@purestorage.com,
	Yuanyuan Zhong <yzhong@purestorage.com>
Subject: [PATCH] nvme-core: initialize status to NVME_SC_HOST_PATH_ERROR
Date: Mon, 12 Apr 2021 17:45:43 -0600
Message-ID: <20210412234543.19913-1-yzhong@purestorage.com> (raw)

Block layer blk_end_sync_rq() silently drops blk_status_t error.
When ->queue_rq returns error, nvme driver should set nvme status
explicitly. Otherwise the passthrough command may take the stale
status as result. A typical value zero will be interpreted as
NVME_SC_SUCCESS, despite the dispatching error from ->queue_rq.

Instead of trying to fix it for every error return, this change
initialize the status to NVME_SC_HOST_PATH_ERROR during
nvme_alloc_request().

Fixes: 27fa9bc54541 ("nvme: split nvme status from block req->errors")
Signed-off-by: Yuanyuan Zhong <yzhong@purestorage.com>
Signed-off-by: Casey Chen <cachen@purestorage.com>
---
 drivers/nvme/host/core.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 0896e21642be..f22323d02755 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -580,6 +580,7 @@ static inline void nvme_clear_nvme_request(struct request *req)
 		nvme_req(req)->flags = 0;
 		req->rq_flags |= RQF_DONTPREP;
 	}
+	nvme_req(req)->status = NVME_SC_HOST_PATH_ERROR;
 }
 
 static inline unsigned int nvme_req_op(struct nvme_command *cmd)
-- 
2.31.1


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Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-12 23:45 Yuanyuan Zhong [this message]
2021-04-13  3:19 ` Chaitanya Kulkarni
2021-04-14 17:08   ` [PATCH v2] " Yuanyuan Zhong
2021-04-15 19:30     ` Keith Busch
2021-04-15 20:17       ` Keith Busch
2021-04-15 22:11         ` Yuanyuan Zhong
2021-04-15 22:58           ` Keith Busch

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