CIP_HEADER_QUADLETS
DEFINE_RAW_FLEX(struct fw_iso_packet, template, header, CIP_HEADER_QUADLETS);
if (payload_quads < CIP_HEADER_QUADLETS) {
payload_quads -= CIP_HEADER_QUADLETS;
#define CIP_HEADER_SIZE (sizeof(__be32) * CIP_HEADER_QUADLETS)