net/mlx5: fix asserts for multi-segment Tx offload misconfig

To support multi-segment packet sending the Tx datapath
DEV_TX_OFFLOAD_MULTI_SEGS offload must be configured.
In debug configuration the asserts arise if the multi-segment
packet is being sent and no DEV_TX_OFFLOAD_MULTI_SEGS is set.
It was found that in some execution paths asserts were missed,
this patch adds ones.

Fixes: 18a1c20044c0 ("net/mlx5: implement Tx burst template")
Cc: stable@dpdk.org
Signed-off-by: Viacheslav Ovsiienko <viacheslavo@mellanox.com>
Acked-by: Matan Azrad <matan@mellanox.com>

diff --git a/drivers/net/mlx5/mlx5_rxtx.c b/drivers/net/mlx5/mlx5_rxtx.c
index f28a909..8bc0542 100644 (file)
--- a/drivers/net/mlx5/mlx5_rxtx.c
+++ b/drivers/net/mlx5/mlx5_rxtx.c
@@ -3875,6 +3875,7 @@ mlx5_tx_burst_empw_simple(struct mlx5_txq_data *restrict txq,
                unsigned int slen = 0;
 
 next_empw:
+               assert(NB_SEGS(loc->mbuf) == 1);
                part = RTE_MIN(pkts_n, MLX5_EMPW_MAX_PACKETS);
                if (unlikely(loc->elts_free < part)) {
                        /* We have no enough elts to save all mbufs. */
@@ -3934,6 +3935,7 @@ next_empw:
                                        return MLX5_TXCMP_CODE_EXIT;
                                return MLX5_TXCMP_CODE_MULTI;
                        }
+                       assert(NB_SEGS(loc->mbuf) == 1);
                        if (ret == MLX5_TXCMP_CODE_TSO) {
                                part -= loop;
                                mlx5_tx_sdone_empw(txq, loc, part, slen, olx);
@@ -4033,6 +4035,7 @@ mlx5_tx_burst_empw_inline(struct mlx5_txq_data *restrict txq,
                unsigned int room, part, nlim;
                unsigned int slen = 0;
 
+               assert(NB_SEGS(loc->mbuf) == 1);
                /*
                 * Limits the amount of packets in one WQE
                 * to improve CQE latency generation.
@@ -4173,6 +4176,7 @@ next_mbuf:
                                        return MLX5_TXCMP_CODE_EXIT;
                                return MLX5_TXCMP_CODE_MULTI;
                        }
+                       assert(NB_SEGS(loc->mbuf) == 1);
                        if (ret == MLX5_TXCMP_CODE_TSO) {
                                part -= room;
                                mlx5_tx_idone_empw(txq, loc, part, slen, olx);