nvmet: remove extra variable in id-ns handler

In nvmet_execute_identify_ns() local variable ctrl is accessed only in
one place, remove that and directly use it from nvmet_req->sq->ctrl.
Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

drivers/nvme/target/admin-cmd.c

@@ -462,7 +462,6 @@ static void nvmet_execute_identify_ctrl(struct nvmet_req *req)
 
 static void nvmet_execute_identify_ns(struct nvmet_req *req)
 {
-	struct nvmet_ctrl *ctrl = req->sq->ctrl;
 	struct nvme_id_ns *id;
 	u16 status;
 
@@ -523,7 +522,7 @@ static void nvmet_execute_identify_ns(struct nvmet_req *req)
 
 	id->lbaf[0].ds = req->ns->blksize_shift;
 
-	if (ctrl->pi_support && nvmet_ns_has_pi(req->ns)) {
+	if (req->sq->ctrl->pi_support && nvmet_ns_has_pi(req->ns)) {
 		id->dpc = NVME_NS_DPC_PI_FIRST | NVME_NS_DPC_PI_LAST |
 			  NVME_NS_DPC_PI_TYPE1 | NVME_NS_DPC_PI_TYPE2 |
 			  NVME_NS_DPC_PI_TYPE3;