[PATCH V3 1/3] nvmet-auth: use common helper to check secp/spsp

[Chaitanya Kulkarni <kch@nvidia.com>]

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

No functional change in this patch.

Signed-off-by: Chaitanya Kulkarni <kch@nvidia.com>
---
 drivers/nvme/target/fabrics-cmd-auth.c | 60 +++++++++++---------------
 1 file changed, 24 insertions(+), 36 deletions(-)

diff --git a/drivers/nvme/target/fabrics-cmd-auth.c b/drivers/nvme/target/fabrics-cmd-auth.c
index 586458f765f1..847aa12d2915 100644
--- a/drivers/nvme/target/fabrics-cmd-auth.c
+++ b/drivers/nvme/target/fabrics-cmd-auth.c
@@ -12,6 +12,23 @@
 #include <crypto/kpp.h>
 #include "nvmet.h"
 
+static u16 nvmet_auth_common_prep(struct nvmet_req *req)
+{
+	if (req->cmd->auth_send.secp != NVME_AUTH_DHCHAP_PROTOCOL_IDENTIFIER) {
+		req->error_loc = offsetof(struct nvmf_auth_send_command, secp);
+		return NVME_SC_INVALID_FIELD | NVME_SC_DNR;
+	}
+	if (req->cmd->auth_send.spsp0 != 0x01) {
+		req->error_loc = offsetof(struct nvmf_auth_send_command, spsp0);
+		return NVME_SC_INVALID_FIELD | NVME_SC_DNR;
+	}
+	if (req->cmd->auth_send.spsp1 != 0x01) {
+		req->error_loc = offsetof(struct nvmf_auth_send_command, spsp1);
+		return NVME_SC_INVALID_FIELD | NVME_SC_DNR;
+	}
+	return NVME_SC_SUCCESS;
+}
+
 static void nvmet_auth_expired_work(struct work_struct *work)
 {
 	struct nvmet_sq *sq = container_of(to_delayed_work(work),
@@ -185,26 +202,12 @@ void nvmet_execute_auth_send(struct nvmet_req *req)
 	struct nvmf_auth_dhchap_success2_data *data;
 	void *d;
 	u32 tl;
-	u16 status = 0;
+	u16 status;
 
-	if (req->cmd->auth_send.secp != NVME_AUTH_DHCHAP_PROTOCOL_IDENTIFIER) {
-		status = NVME_SC_INVALID_FIELD | NVME_SC_DNR;
-		req->error_loc =
-			offsetof(struct nvmf_auth_send_command, secp);
-		goto done;
-	}
-	if (req->cmd->auth_send.spsp0 != 0x01) {
-		status = NVME_SC_INVALID_FIELD | NVME_SC_DNR;
-		req->error_loc =
-			offsetof(struct nvmf_auth_send_command, spsp0);
-		goto done;
-	}
-	if (req->cmd->auth_send.spsp1 != 0x01) {
-		status = NVME_SC_INVALID_FIELD | NVME_SC_DNR;
-		req->error_loc =
-			offsetof(struct nvmf_auth_send_command, spsp1);
+	status = nvmet_auth_common_prep(req);
+	if (status)
 		goto done;
-	}
+
 	tl = le32_to_cpu(req->cmd->auth_send.tl);
 	if (!tl) {
 		status = NVME_SC_INVALID_FIELD | NVME_SC_DNR;
@@ -432,26 +435,11 @@ void nvmet_execute_auth_receive(struct nvmet_req *req)
 	struct nvmet_ctrl *ctrl = req->sq->ctrl;
 	void *d;
 	u32 al;
-	u16 status = 0;
+	u16 status;
 
-	if (req->cmd->auth_receive.secp != NVME_AUTH_DHCHAP_PROTOCOL_IDENTIFIER) {
-		status = NVME_SC_INVALID_FIELD | NVME_SC_DNR;
-		req->error_loc =
-			offsetof(struct nvmf_auth_receive_command, secp);
-		goto done;
-	}
-	if (req->cmd->auth_receive.spsp0 != 0x01) {
-		status = NVME_SC_INVALID_FIELD | NVME_SC_DNR;
-		req->error_loc =
-			offsetof(struct nvmf_auth_receive_command, spsp0);
-		goto done;
-	}
-	if (req->cmd->auth_receive.spsp1 != 0x01) {
-		status = NVME_SC_INVALID_FIELD | NVME_SC_DNR;
-		req->error_loc =
-			offsetof(struct nvmf_auth_receive_command, spsp1);
+	status = nvmet_auth_common_prep(req);
+	if (status)
 		goto done;
-	}
 	al = le32_to_cpu(req->cmd->auth_receive.al);
 	if (!al) {
 		status = NVME_SC_INVALID_FIELD | NVME_SC_DNR;
-- 
2.40.0