Bluetooth: Fix input device registration

This is a regression fix. It made impossible use input device when hid
fails.
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>

net/bluetooth/hidp/core.c

@@ -812,7 +812,7 @@ static int hidp_setup_input(struct hidp_session *session,
 				struct hidp_connadd_req *req)
 {
 	struct input_dev *input;
-	int err, i;
+	int i;
 
 	input = input_allocate_device();
 	if (!input)
@@ -859,13 +859,6 @@ static int hidp_setup_input(struct hidp_session *session,
 
 	input->event = hidp_input_event;
 
-	err = input_register_device(input);
-	if (err < 0) {
-		input_free_device(input);
-		session->input = NULL;
-		return err;
-	}
-
 	return 0;
 }
 
@@ -1067,7 +1060,11 @@ int hidp_add_connection(struct hidp_connadd_req *req, struct socket *ctrl_sock,
 			!session->waiting_for_startup);
 	}
 
-	err = hid_add_device(session->hid);
+	if (session->hid)
+		err = hid_add_device(session->hid);
+	else
+		err = input_register_device(session->input);
+
 	if (err < 0) {
 		atomic_inc(&session->terminate);
 		wake_up_process(session->task);