net/hns3: remove unnecessary assignments in Tx

This patch removes the unnecessary assignment in the '.tx_pkt_burst' ops
implementation function to avoid performance loss.

Signed-off-by: Wei Hu (Xavier) <xavier.huwei@huawei.com>
Signed-off-by: Yisen Zhuang <yisen.zhuang@huawei.com>

diff --git a/drivers/net/hns3/hns3_rxtx.c b/drivers/net/hns3/hns3_rxtx.c
index d9219d1..003a5bd 100644 (file)
--- a/drivers/net/hns3/hns3_rxtx.c
+++ b/drivers/net/hns3/hns3_rxtx.c
@@ -1181,8 +1181,7 @@ hns3_tx_free_useless_buffer(struct hns3_tx_queue *txq)
                (tx_next_use != tx_next_clean || tx_bd_ready < tx_bd_max)) {
                mbuf = tx_bak_pkt->mbuf;
                if (mbuf) {
-                       mbuf->next = NULL;
-                       rte_pktmbuf_free(mbuf);
+                       rte_pktmbuf_free_seg(mbuf);
                        tx_bak_pkt->mbuf = NULL;
                }
 
@@ -1600,9 +1599,7 @@ hns3_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
        struct rte_mbuf *new_pkt;
        struct rte_mbuf *tx_pkt;
        struct rte_mbuf *m_seg;
-       struct rte_mbuf *temp;
        uint32_t nb_hold = 0;
-       uint16_t tx_next_clean;
        uint16_t tx_next_use;
        uint16_t tx_bd_ready;
        uint16_t tx_pkt_num;
@@ -1617,11 +1614,8 @@ hns3_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
        if (tx_bd_ready == 0)
                return 0;
 
-       tx_next_clean = txq->next_to_clean;
        tx_next_use   = txq->next_to_use;
        tx_bd_max     = txq->nb_tx_desc;
-       tx_bak_pkt = &txq->sw_ring[tx_next_clean];
-
        tx_pkt_num = (tx_bd_ready < nb_pkts) ? tx_bd_ready : nb_pkts;
 
        /* send packets */
@@ -1676,9 +1670,8 @@ hns3_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
                i = 0;
                do {
                        fill_desc(txq, tx_next_use, m_seg, (i == 0), 0);
-                       temp = m_seg->next;
                        tx_bak_pkt->mbuf = m_seg;
-                       m_seg = temp;
+                       m_seg = m_seg->next;
                        tx_next_use++;
                        tx_bak_pkt++;
                        if (tx_next_use >= tx_bd_max) {
@@ -1697,7 +1690,6 @@ end_of_tx:
 
        if (likely(nb_tx)) {
                hns3_queue_xmit(txq, nb_hold);
-               txq->next_to_clean = tx_next_clean;
                txq->tx_bd_ready   = tx_bd_ready - nb_hold;
        }