rtrs_sg_desc
req->sg_size += le16_to_cpu(msg->sg_cnt) * sizeof(struct rtrs_sg_desc);
const struct rtrs_sg_desc *desc = &msg->desc[sgi];
rx_sz += sizeof(struct rtrs_sg_desc) * clt_path->queue_depth;
sg_cnt * sizeof(struct rtrs_sg_desc);
struct rtrs_sg_desc desc[];
struct rtrs_sg_desc desc[];