[PATCH V3 1/6] nvme-core: add a helper to init req from nvme cmd

[Chaitanya Kulkarni <chaitanya.kulkarni@xxxxxxx>]

This is a preparation patch which adds a helper that we use in the next
patch that splits the nvme_alloc_request() into
nvme_alloc_request_qid_any() and nvme_alloc_request_qid(). The new
functions shares the code to initialize the allocated request from NVMe
cmd.

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@xxxxxxx>
---
 drivers/nvme/host/core.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 56e2a22e8a02..5bc52594fe63 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -514,6 +514,14 @@ static inline void nvme_clear_nvme_request(struct request *req)
 	}
 }
 
+static inline void nvme_init_req_from_cmd(struct request *req,
+		struct nvme_command *cmd)
+{
+	req->cmd_flags |= REQ_FAILFAST_DRIVER;
+	nvme_clear_nvme_request(req);
+	nvme_req(req)->cmd = cmd;
+}
+
 struct request *nvme_alloc_request(struct request_queue *q,
 		struct nvme_command *cmd, blk_mq_req_flags_t flags, int qid)
 {
@@ -529,9 +537,7 @@ struct request *nvme_alloc_request(struct request_queue *q,
 	if (IS_ERR(req))
 		return req;
 
-	req->cmd_flags |= REQ_FAILFAST_DRIVER;
-	nvme_clear_nvme_request(req);
-	nvme_req(req)->cmd = cmd;
+	nvme_init_req_from_cmd(req, cmd);
 
 	return req;
 }
-- 
2.22.1