Turns out all UBI volumes need to have a unique name.

brcm_fw_tool/image-ubi.c

@@ -226,14 +226,21 @@ int ubi_erase_volume(int volId)
 int ubi_create_volume(int volId, long long size)
 {
 	struct ubi_mkvol_request mkReq;
-	char *nodePath;
+	char *nodePath, *name;
+
+	if(volId < 0 || volId >= UBI_MAX_VOLUMES) return -1;
+	if(size <= 0ll) return -1;
+
+	// Generate a system unique name for the volume.
+	name = calloc(1, strlen(ubiStr3) + 8);
+	snprintf(name, strlen(ubiStr3) + 8, "%s_%d", ubiStr3, volId);
 
 	memset(&mkReq, 0, sizeof(mkReq));
 	mkReq.vol_id = volId;
 	mkReq.alignment = 1;
 	mkReq.bytes = size;
 	mkReq.vol_type = UBI_STATIC_VOLUME;
-	mkReq.name = ubiStr3;
+	mkReq.name = name;
 	nodePath = ubi_path_by_id(devInfo.dev_num, -1);
 	errno = 0;
 
@@ -241,6 +248,7 @@ int ubi_create_volume(int volId, long long size)
 		fprintf(stderr, "Error creating UBI volume %d %s: %s\n",
 			volId, nodePath, strerror(errno));
 		free(nodePath);
+		free(name);
 		return -1;
 	}
 	else if (verbose) {
@@ -248,6 +256,7 @@ int ubi_create_volume(int volId, long long size)
 	}
 
 	free(nodePath);
+	free(name);
 	return 0;
 }
 
@@ -791,6 +800,8 @@ int gen_image_ubi(const char *in_file, char *sequence_number)
 
 	if(!res) res = meta_manage_vols();
 
+	unlink("/tmp/ronny");														// Possibly erase temporary file.
+
 	// Close the UBI library.
 	if(libubi) {
 		for(i = 0; i < MAX_METAS; i++) {