+
+ descs_required += nb_tso_descs;
+
+ /*
+ * If headers segments are already counted above, here
+ * nothing is done since remaining length is smaller
+ * then current segment size.
+ */
+ nb_header_segs +=
+ sfc_dp_tx_pkt_extra_hdr_segs(&m_seg,
+ &header_len_remaining);
+
+ /*
+ * Extra descriptor which is required when (a part of) payload
+ * shares the same segment with (a part of) the header.
+ */
+ if (rte_pktmbuf_data_len(m_seg) > header_len_remaining)
+ descs_required++;
+
+ if (tso_bounce_buffer_len != 0) {
+ if (nb_header_segs > 1 &&
+ unlikely(header_len > tso_bounce_buffer_len)) {
+ /*
+ * Header linearization is required and
+ * the header is too big to be linearized
+ */
+ return EINVAL;
+ }
+ }