backend/wayland: add error flow in create_wl_seat

backend/wayland/backend.c

@@ -105,7 +105,9 @@ static void registry_global(void *data, struct wl_registry *registry,
 	} else if (strcmp(iface, wl_seat_interface.name) == 0) {
 		struct wl_seat *wl_seat = wl_registry_bind(registry, name,
 			&wl_seat_interface, 5);
-		create_wl_seat(wl_seat, wl);
+		if (!create_wl_seat(wl_seat, wl)) {
+			wl_seat_destroy(wl_seat);
+		}
 	} else if (strcmp(iface, xdg_wm_base_interface.name) == 0) {
 		wl->xdg_wm_base = wl_registry_bind(registry, name,
 			&xdg_wm_base_interface, 1);

backend/wayland/seat.c

@@ -372,12 +372,17 @@ static struct wlr_wl_input_device *get_wl_input_device_from_input_device(
 	return (struct wlr_wl_input_device *)wlr_dev;
 }
 
-void create_wl_seat(struct wl_seat *wl_seat, struct wlr_wl_backend *wl) {
+bool create_wl_seat(struct wl_seat *wl_seat, struct wlr_wl_backend *wl) {
 	assert(!wl->seat);  // only one seat supported at the moment
 	struct wlr_wl_seat *seat = calloc(1, sizeof(struct wlr_wl_seat));
+	if (!seat) {
+		wlr_log_errno(WLR_ERROR, "Allocation failed");
+		return false;
+	}
 	seat->wl_seat = wl_seat;
 	wl->seat = seat;
 	wl_seat_add_listener(wl_seat, &seat_listener, wl);
+	return true;
 }
 
 void destroy_wl_seats(struct wlr_wl_backend *wl) {

include/backend/wayland.h

@@ -121,7 +121,7 @@ void create_wl_keyboard(struct wl_keyboard *wl_keyboard, struct wlr_wl_backend *
 void create_wl_touch(struct wl_touch *wl_touch, struct wlr_wl_backend *wl);
 struct wlr_wl_input_device *create_wl_input_device(
 	struct wlr_wl_backend *backend, enum wlr_input_device_type type);
-void create_wl_seat(struct wl_seat *wl_seat, struct wlr_wl_backend *wl);
+bool create_wl_seat(struct wl_seat *wl_seat, struct wlr_wl_backend *wl);
 void destroy_wl_seats(struct wlr_wl_backend *wl);
 
 extern const struct wl_seat_listener seat_listener;