The jumbo frame uses the 'RTE_ETHER_MAX_LEN' as boundary condition, but
the Ether overhead is larger than 18 when it supports dual VLAN tags.
That will cause the jumbo flag rx offload is wrong when MTU size is
'RTE_ETHER_MTU'.

This fix will change the boundary condition with 'RTE_ETHER_MTU'.

Fixes: 70d6b7f550f4 ("net/ipn3ke: add representor")

Signed-off-by: Steve Yang <stevex.y...@intel.com>
---
 drivers/net/ipn3ke/ipn3ke_representor.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ipn3ke/ipn3ke_representor.c 
b/drivers/net/ipn3ke/ipn3ke_representor.c
index 8a53602576..c8ca58cc4b 100644
--- a/drivers/net/ipn3ke/ipn3ke_representor.c
+++ b/drivers/net/ipn3ke/ipn3ke_representor.c
@@ -2801,7 +2801,7 @@ ipn3ke_rpst_mtu_set(struct rte_eth_dev *ethdev, uint16_t 
mtu)
                return -EBUSY;
        }
 
-       if (frame_size > RTE_ETHER_MAX_LEN)
+       if (mtu > RTE_ETHER_MTU)
                dev_data->dev_conf.rxmode.offloads |=
                        (uint64_t)(DEV_RX_OFFLOAD_JUMBO_FRAME);
        else
-- 
2.17.1

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