[PATCH V2 3/4] nvmet-auth: use helper for auth send/recv cmd prep

[Chaitanya Kulkarni <kch@nvidia.com>]

Add a common helper to factor out secp/spsp values check and transfer
buffer allocation in nvmet_execute_auth_send() and
nvmet_execute_auth_receive().

Signed-off-by: Chaitanya Kulkarni <kch@nvidia.com>
---
 drivers/nvme/target/fabrics-cmd-auth.c | 19 +++++++++++--------
 1 file changed, 11 insertions(+), 8 deletions(-)

diff --git a/drivers/nvme/target/fabrics-cmd-auth.c b/drivers/nvme/target/fabrics-cmd-auth.c
index 778961e231a3..d331c22ed26e 100644
--- a/drivers/nvme/target/fabrics-cmd-auth.c
+++ b/drivers/nvme/target/fabrics-cmd-auth.c
@@ -41,6 +41,15 @@ static u16 nvmet_auth_alloc_transfer_buffer(struct nvmet_req *req, void **buf,
 	return *buf ? NVME_SC_SUCCESS : NVME_SC_INTERNAL;
 }
 
+static u16 nvmet_auth_common_prep(struct nvmet_req *req, void **buf, u32 *len)
+{
+	u16 status = nvmet_auth_check_secp_spsp(req);
+
+	if (status)
+		return status;
+	return nvmet_auth_alloc_transfer_buffer(req, buf, len);
+}
+
 static void nvmet_auth_expired_work(struct work_struct *work)
 {
 	struct nvmet_sq *sq = container_of(to_delayed_work(work),
@@ -216,10 +225,7 @@ void nvmet_execute_auth_send(struct nvmet_req *req)
 	u32 tl;
 	u16 status;
 
-	status = nvmet_auth_check_secp_spsp(req);
-	if (status)
-		goto done;
-	status = nvmet_auth_alloc_transfer_buffer(req, &d, &tl);
+	status = nvmet_auth_common_prep(req, &d, &tl);
 	if (status)
 		goto done;
 
@@ -440,10 +446,7 @@ void nvmet_execute_auth_receive(struct nvmet_req *req)
 	u32 al;
 	u16 status;
 
-	status = nvmet_auth_check_secp_spsp(req);
-	if (status)
-		goto done;
-	status = nvmet_auth_alloc_transfer_buffer(req, &d, &al);
+	status = nvmet_auth_common_prep(req, &d, &al);
 	if (status)
 		goto done;
 	if (!nvmet_check_transfer_len(req, al)) {
-- 
2.40.0