obp_crc24
if (obp_crc24(sc->core.buf, blksize) != crc) {
crc, obp_crc24(sc->core.buf, blksize));
uint32_t obp_crc24(uint8_t *buf, size_t bytes);
if (obp_crc24(rbuf, blksize) != crc) {
obp_crc24(rbuf, blksize));