RDS: Clean up error handling in rds_cmsg_rdma_args

We don't need to set ret = 0 at the end -- it's initialized to 0.

Also, don't increment s_send_rdma stat if we're exiting with an
error.
Signed-off-by: Andy Grover <andy.grover@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/rds/rdma.c

@@ -664,12 +664,11 @@ int rds_cmsg_rdma_args(struct rds_sock *rs, struct rds_message *rm,
 	}
 	op->op_bytes = nr_bytes;
 
-	ret = 0;
 out:
 	kfree(pages);
 	if (ret)
 		rds_rdma_free_op(op);
-
+	else
 		rds_stats_inc(s_send_rdma);
 
 	return ret;