Merge "liblp: Handle invalid alignment offsets correctly."

        PERROR << __PRETTY_FUNCTION__ << "BLKALIGNOFF failed on " << block_device;

        return false;

    }

    // The kernel can return -1 here when misaligned devices are stacked (i.e.

    // device-mapper).

    if (alignment_offset == -1) {

        alignment_offset = 0;

    }

    int logical_block_size;

    if (ioctl(fd, BLKSSZGET, &logical_block_size) < 0) {

        PERROR << __PRETTY_FUNCTION__ << "BLKSSZGET failed on " << block_device;