mtd: mtdpart: check for subpartitions parsing result

parse_mtd_partitions() may return an error so it should be checked and
optionally passed up

Signed-off-by: Rafał Miłecki <[e-mail]>
Signed-off-by: Miquel Raynal <[e-mail]>
Link: https://lore.kernel.org/linux-mtd/[e-mail]

drivers/mtd/mtdpart.c

···
 		mtd_add_partition_attrs(child);
 
 		/* Look for subpartitions */
-		parse_mtd_partitions(child, parts[i].types, NULL);
+		ret = parse_mtd_partitions(child, parts[i].types, NULL);
+		if (ret < 0) {
+			pr_err("Failed to parse subpartitions: %d\n", ret);
+			goto err_del_partitions;
+		}
 
 		cur_offset = child->part.offset + child->part.size;
 	}