[dpdk-dev] [PATCH] net/mlx5: fix TSO segment size

[Shahaf Shuler]

In case on multi segment packet, the TSO segment size
was taken from the last segment. This may lead to incorrect
values in case not all segments are initialized with the field.

Fixing it by taking the value from the first segment.

Fixes: 3f13f8c23a7c ("net/mlx5: support hardware TSO")
Cc: stable at dpdk.org

Signed-off-by: Shahaf Shuler <shahafs at mellanox.com>
Acked-by: Yongseok Koh <yskoh at mellanox.com>
---
 drivers/net/mlx5/mlx5_rxtx.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/mlx5/mlx5_rxtx.c b/drivers/net/mlx5/mlx5_rxtx.c
index cade625f9..70314b393 100644
--- a/drivers/net/mlx5/mlx5_rxtx.c
+++ b/drivers/net/mlx5/mlx5_rxtx.c
@@ -527,6 +527,7 @@ mlx5_tx_burst(void *dpdk_txq, struct rte_mbuf **pkts, uint16_t pkts_n)
 		uint16_t ehdr;
 		uint8_t cs_flags = 0;
 		uint64_t tso = 0;
+		uint16_t tso_segsz = 0;
 #ifdef MLX5_PMD_SOFT_COUNTERS
 		uint32_t total_length = 0;
 #endif
@@ -622,6 +623,7 @@ mlx5_tx_burst(void *dpdk_txq, struct rte_mbuf **pkts, uint16_t pkts_n)
 
 				tso_header_sz = buf->l2_len + vlan_sz +
 						buf->l3_len + buf->l4_len;
+				tso_segsz = buf->tso_segsz;
 
 				if (is_tunneled	&& txq->tunnel_en) {
 					tso_header_sz += buf->outer_l2_len +
@@ -821,7 +823,7 @@ mlx5_tx_burst(void *dpdk_txq, struct rte_mbuf **pkts, uint16_t pkts_n)
 			};
 			wqe->eseg = (rte_v128u32_t){
 				0,
-				cs_flags | (htons(buf->tso_segsz) << 16),
+				cs_flags | (htons(tso_segsz) << 16),
 				0,
 				(ehdr << 16) | htons(tso_header_sz),
 			};
-- 
2.12.0