ptr->offsets[2] &= ~(mtdInfo.erasesize - 1);
ptr->len = ptr->offsets[2];
ptr->crc32 = crc32buf((void *) &(ptr->flag_version), ptr->len - offsetof(struct trx_header, flag_version));
ptr->offsets[2] &= ~(mtdInfo.erasesize - 1);
ptr->len = ptr->offsets[2];
ptr->crc32 = crc32buf((void *) &(ptr->flag_version), ptr->len - offsetof(struct trx_header, flag_version));