[PATCH 5/5] nvme: return -ETIMEDOUT in nvme_submit_sync_cmd()

[Hannes Reinecke]

When a command times out we should be returning -ETIMEDOUT in
nvme_submit_sync_cmd(), and not requiring the caller to guess whether
a specific NVMe status should be interpreted as a timeout.

Signed-off-by: Hannes Reinecke <hare at suse.de>
---
 drivers/nvme/host/core.c | 2 ++
 drivers/nvme/host/fc.c   | 1 +
 drivers/nvme/host/nvme.h | 1 +
 drivers/nvme/host/rdma.c | 1 +
 drivers/nvme/host/tcp.c  | 1 +
 5 files changed, 6 insertions(+)

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 1f723b7e9efb..8376f65d52ca 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -969,6 +969,8 @@ int __nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,
 		*result = nvme_req(req)->result;
 	if (nvme_req(req)->flags & NVME_REQ_CANCELLED)
 		ret = -EINTR;
+	else if (nvme_req(req)->flags & NVME_REQ_TIMEOUT)
+		ret = -ETIMEDOUT;
 	else
 		ret = nvme_req(req)->status;
  out:
diff --git a/drivers/nvme/host/fc.c b/drivers/nvme/host/fc.c
index 86395b66310d..bcc086fcbe61 100644
--- a/drivers/nvme/host/fc.c
+++ b/drivers/nvme/host/fc.c
@@ -2551,6 +2551,7 @@ nvme_fc_timeout(struct request *rq, bool reserved)
 		"x%08x/x%08x\n",
 		ctrl->cnum, op->queue->qnum, sqe->common.opcode,
 		sqe->connect.fctype, sqe->common.cdw10, sqe->common.cdw11);
+	op->nreq.flags |= NVME_REQ_TIMEOUT;
 	if (__nvme_fc_abort_op(ctrl, op))
 		nvme_fc_error_recovery(ctrl, "io timeout abort failed");
 
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
index 88a6b97247f5..b0254692dc2a 100644
--- a/drivers/nvme/host/nvme.h
+++ b/drivers/nvme/host/nvme.h
@@ -167,6 +167,7 @@ struct nvme_request {
 enum {
 	NVME_REQ_CANCELLED		= (1 << 0),
 	NVME_REQ_USERCMD		= (1 << 1),
+	NVME_REQ_TIMEOUT		= (1 << 2),
 };
 
 static inline struct nvme_request *nvme_req(struct request *req)
diff --git a/drivers/nvme/host/rdma.c b/drivers/nvme/host/rdma.c
index b7ce4f221d99..634ed5f5f778 100644
--- a/drivers/nvme/host/rdma.c
+++ b/drivers/nvme/host/rdma.c
@@ -1984,6 +1984,7 @@ static void nvme_rdma_complete_timed_out(struct request *rq)
 	nvme_rdma_stop_queue(queue);
 	if (blk_mq_request_started(rq) && !blk_mq_request_completed(rq)) {
 		nvme_req(rq)->status = NVME_SC_HOST_ABORTED_CMD;
+		nvme_req(rq)->flags |= NVME_REQ_TIMEOUT;
 		blk_mq_complete_request(rq);
 	}
 }
diff --git a/drivers/nvme/host/tcp.c b/drivers/nvme/host/tcp.c
index 4c13c7110dbe..eee9470bb1bd 100644
--- a/drivers/nvme/host/tcp.c
+++ b/drivers/nvme/host/tcp.c
@@ -2183,6 +2183,7 @@ static void nvme_tcp_complete_timed_out(struct request *rq)
 	nvme_tcp_stop_queue(ctrl, nvme_tcp_queue_id(req->queue));
 	if (blk_mq_request_started(rq) && !blk_mq_request_completed(rq)) {
 		nvme_req(rq)->status = NVME_SC_HOST_ABORTED_CMD;
+		nvme_req(rq)->flags |= NVME_REQ_TIMEOUT;
 		blk_mq_complete_request(rq);
 	}
 }
-- 
2.29.2