UCAN_IN_HDR_SIZE
return can_cc_dlc2len(len - (UCAN_IN_HDR_SIZE + sizeof(msg->id)));
if (len < UCAN_IN_HDR_SIZE + sizeof(m->msg.can_msg.id)) {
if (len < UCAN_IN_HDR_SIZE || (len % 2 != 0)) {
count = (len - UCAN_IN_HDR_SIZE) / 2;
if ((urb->actual_length - pos) < UCAN_IN_HDR_SIZE) {