In test_rmap_blocks(), we have ret = 0 before checking the results. We need to set it to -EINVAL, so that a mismatching result will return -EINVAL not 0. Reviewed-by: Qu Wenruo <wqu@suse.com> Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>