nvmet-auth: fix return value check in auth send

nvmet_setup_auth() return type is int and currently it uses status
variable that is of type u16 in nvmet_execute_auth_send().

Catch the return value of nvmet_setup_auth() into int and set the
NVME_SC_INTERNAL as status variable before we jump to error.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

drivers/nvme/target/fabrics-cmd-auth.c

@@ -247,8 +247,8 @@ void nvmet_execute_auth_send(struct nvmet_req *req)
 			pr_debug("%s: ctrl %d qid %d reset negotiation\n", __func__,
 				 ctrl->cntlid, req->sq->qid);
 			if (!req->sq->qid) {
-				status = nvmet_setup_auth(ctrl);
-				if (status < 0) {
+				if (nvmet_setup_auth(ctrl) < 0) {
+					status = NVME_SC_INTERNAL;
 					pr_err("ctrl %d qid 0 failed to setup"
 					       "re-authentication",
 					       ctrl->cntlid);