usb/serial/garmin_gps.c

338 	__u8 cksum = 0;
347 	cksum += ACK;
350 	cksum += 2;
353 	cksum += pkt_id;
359 	*ptr++ = (-cksum) & 0xFF;
374  * the complete packet (pktid ... cksum) is in garmin_data_p->inbuf starting
379  *         (including pkt-id, data-length a. cksum)
387 	int cksum = 0;
401 	cksum += *recpkt++;
402 	cksum += *recpkt++;
412 		cksum += *recpkt++;
416 	if (((cksum + *recpkt) & 0xff) != 0) {
418 			__func__, -cksum & 0xff, *recpkt);
592 	int cksum = 0;
667 	cksum += pktid;
669 	cksum += datalen;
676 		cksum += c;
681 	cksum = -cksum & 0xFF;
682 	*dst++ = cksum;
683 	if (cksum == DLE)