net/mlx5: fix Tx packets statistics

The transmitter packets counter was not updated
correctly in the loop inside the tx_burst routines.

Fixes: f32a3f5216a3 ("net/mlx5: fix completion queue overflow for large burst")
Cc: stable@dpdk.org
Signed-off-by: Viacheslav Ovsiienko <viacheslavo@mellanox.com>

diff --git a/drivers/net/mlx5/mlx5_rxtx.c b/drivers/net/mlx5/mlx5_rxtx.c
index 10d0ca1..20c1946 100644 (file)
--- a/drivers/net/mlx5/mlx5_rxtx.c
+++ b/drivers/net/mlx5/mlx5_rxtx.c
@@ -4568,7 +4568,7 @@ send_loop:
        loc.wqe_free = txq->wqe_s -
                                (uint16_t)(txq->wqe_ci - txq->wqe_pi);
        if (unlikely(!loc.elts_free || !loc.wqe_free))
-               return loc.pkts_sent;
+               goto burst_exit;
        for (;;) {
                /*
                 * Fetch the packet from array. Usually this is
@@ -4735,7 +4735,7 @@ enter_send_single:
        assert(MLX5_TXOFF_CONFIG(INLINE) || loc.pkts_sent >= loc.pkts_copy);
        /* Take a shortcut if nothing is sent. */
        if (unlikely(loc.pkts_sent == loc.pkts_loop))
-               return loc.pkts_sent;
+               goto burst_exit;
        /*
         * Ring QP doorbell immediately after WQE building completion
         * to improve latencies. The pure software related data treatment
@@ -4758,10 +4758,6 @@ enter_send_single:
                mlx5_tx_copy_elts(txq, pkts + loc.pkts_copy, part, olx);
                loc.pkts_copy = loc.pkts_sent;
        }
-#ifdef MLX5_PMD_SOFT_COUNTERS
-       /* Increment sent packets counter. */
-       txq->stats.opackets += loc.pkts_sent;
-#endif
        assert(txq->elts_s >= (uint16_t)(txq->elts_head - txq->elts_tail));
        assert(txq->wqe_s >= (uint16_t)(txq->wqe_ci - txq->wqe_pi));
        if (pkts_n > loc.pkts_sent) {
@@ -4772,6 +4768,11 @@ enter_send_single:
                 */
                goto send_loop;
        }
+burst_exit:
+#ifdef MLX5_PMD_SOFT_COUNTERS
+       /* Increment sent packets counter. */
+       txq->stats.opackets += loc.pkts_sent;
+#endif
        return loc.pkts_sent;
 }