[PATCH 12/14] nvmet: remove repeated call for desclist

[Chaitanya Kulkarni]

Return status from nvmet_execute_identidy_desclist() and complete
the request in nvmet_execute_identify(). This reduces number of
repeated nvmet_req_complete() calls for identify handlers.

Also, now we can get rid of the goto and out label needed for request
completion and directly return.

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni at wdc.com>
---
 drivers/nvme/target/admin-cmd.c | 33 ++++++++++++++-------------------
 1 file changed, 14 insertions(+), 19 deletions(-)

diff --git a/drivers/nvme/target/admin-cmd.c b/drivers/nvme/target/admin-cmd.c
index 749d7e695fa2..02d28158e9f0 100644
--- a/drivers/nvme/target/admin-cmd.c
+++ b/drivers/nvme/target/admin-cmd.c
@@ -619,58 +619,54 @@ static u16 nvmet_copy_ns_identifier(struct nvmet_req *req, u8 type, u8 len,
 	return 0;
 }
 
-static void nvmet_execute_identify_desclist(struct nvmet_req *req)
+static u16 nvmet_execute_identify_desclist(struct nvmet_req *req)
 {
 	off_t off = 0;
 	u16 status;
 
 	status = nvmet_req_find_ns(req);
 	if (status)
-		goto out;
+		return status;
 
 	if (memchr_inv(&req->ns->uuid, 0, sizeof(req->ns->uuid))) {
 		status = nvmet_copy_ns_identifier(req, NVME_NIDT_UUID,
 						  NVME_NIDT_UUID_LEN,
 						  &req->ns->uuid, &off);
 		if (status)
-			goto out;
+			return status;
 	}
 	if (memchr_inv(req->ns->nguid, 0, sizeof(req->ns->nguid))) {
 		status = nvmet_copy_ns_identifier(req, NVME_NIDT_NGUID,
 						  NVME_NIDT_NGUID_LEN,
 						  &req->ns->nguid, &off);
 		if (status)
-			goto out;
+			return status;
 	}
 
 	status = nvmet_copy_ns_identifier(req, NVME_NIDT_CSI,
 					  NVME_NIDT_CSI_LEN,
 					  &req->ns->csi, &off);
 	if (status)
-		goto out;
+		return status;
 
 	if (sg_zero_buffer(req->sg, req->sg_cnt, NVME_IDENTIFY_DATA_SIZE - off,
 			off) != NVME_IDENTIFY_DATA_SIZE - off)
-		status = NVME_SC_INTERNAL | NVME_SC_DNR;
+		return NVME_SC_INTERNAL | NVME_SC_DNR;
 
-out:
-	nvmet_req_complete(req, status);
+	return status;
 }
 
-static bool nvmet_handle_identify_desclist(struct nvmet_req *req)
+static u16 nvmet_handle_identify_desclist(struct nvmet_req *req)
 {
 	switch (req->cmd->identify.csi) {
 	case NVME_CSI_NVM:
-		nvmet_execute_identify_desclist(req);
-		return true;
+		return nvmet_execute_identify_desclist(req);
 	case NVME_CSI_ZNS:
-		if (IS_ENABLED(CONFIG_BLK_DEV_ZONED)) {
-			nvmet_execute_identify_desclist(req);
-			return true;
-		}
-		return false;
+		if (IS_ENABLED(CONFIG_BLK_DEV_ZONED))
+			return nvmet_execute_identify_desclist(req);
+		return NVME_SC_INVALID_FIELD | NVME_SC_DNR;
 	default:
-		return false;
+		return NVME_SC_INVALID_FIELD | NVME_SC_DNR;
 	}
 }
 
@@ -728,8 +724,7 @@ static void nvmet_execute_identify(struct nvmet_req *req)
 		}
 		break;
 	case NVME_ID_CNS_NS_DESC_LIST:
-		if (nvmet_handle_identify_desclist(req) == true)
-			return;
+		status = nvmet_handle_identify_desclist(req);
 		break;
 	default:
 		pr_debug("unhandled identify cns %d on qid %d\n",
-- 
2.22.1