[PATCH] net/tap: do not include l2 header in gso size when compared with mtu

[Harold Huang]

The gso size is calculated with all of the headers and payload. As a
result, the l2 header should not be included when comparing gso size
with mtu.

Fixes: 050316a88313 ("net/tap: support TSO (TCP Segment Offload)")
Cc: sta...@dpdk.org
Signed-off-by: Harold Huang <baymaxhu...@gmail.com>
---
 drivers/net/tap/rte_eth_tap.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/tap/rte_eth_tap.c b/drivers/net/tap/rte_eth_tap.c
index f1b48cae82..2b561d232c 100644
--- a/drivers/net/tap/rte_eth_tap.c
+++ b/drivers/net/tap/rte_eth_tap.c
@@ -731,7 +731,7 @@ pmd_tx_burst(void *queue, struct rte_mbuf **bufs, uint16_t 
nb_pkts)
                                        mbuf_in->l4_len;
                        tso_segsz = mbuf_in->tso_segsz + hdrs_len;
                        if (unlikely(tso_segsz == hdrs_len) ||
-                               tso_segsz > *txq->mtu) {
+                               tso_segsz > *txq->mtu + mbuf_in->l2_len) {
                                txq->stats.errs++;
                                break;
                        }
-- 
2.27.0