[dpdk-dev] [PATCH v1 03/12] net/hns3: fix the jumbo frame flag condition for mtu set

[Steve Yang]

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: 1f5ca0b460cd ("net/hns3: support some device operations")
Fixes: a5475d61fa34 ("net/hns3: support VF")

Signed-off-by: Steve Yang <stevex.y...@intel.com>
---
 drivers/net/hns3/hns3_ethdev.c    | 2 +-
 drivers/net/hns3/hns3_ethdev_vf.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/hns3/hns3_ethdev.c b/drivers/net/hns3/hns3_ethdev.c
index 2011378879..1a5cfd3e1f 100644
--- a/drivers/net/hns3/hns3_ethdev.c
+++ b/drivers/net/hns3/hns3_ethdev.c
@@ -2458,7 +2458,7 @@ hns3_dev_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
        }
 
        rte_spinlock_lock(&hw->lock);
-       is_jumbo_frame = frame_size > RTE_ETHER_MAX_LEN ? true : false;
+       is_jumbo_frame = mtu > RTE_ETHER_MTU ? true : false;
        frame_size = RTE_MAX(frame_size, HNS3_DEFAULT_FRAME_LEN);
 
        /*
diff --git a/drivers/net/hns3/hns3_ethdev_vf.c 
b/drivers/net/hns3/hns3_ethdev_vf.c
index 0366b9d4dc..d47af417bf 100644
--- a/drivers/net/hns3/hns3_ethdev_vf.c
+++ b/drivers/net/hns3/hns3_ethdev_vf.c
@@ -928,7 +928,7 @@ hns3vf_dev_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
                rte_spinlock_unlock(&hw->lock);
                return ret;
        }
-       if (frame_size > RTE_ETHER_MAX_LEN)
+       if (mtu > RTE_ETHER_MTU)
                dev->data->dev_conf.rxmode.offloads |=
                                                DEV_RX_OFFLOAD_JUMBO_FRAME;
        else
-- 
2.17.1