[dpdk-dev] [PATCH] net/i40e: consider QinQ when setting MTU

[Wenzhuo Lu]

When counting max packet length from MTU, count
VLAN tag length twice for QinQ packets.

Signed-off-by: Wenzhuo Lu <wenzhuo.lu at intel.com>
---
 drivers/net/i40e/i40e_ethdev.c    | 2 +-
 drivers/net/i40e/i40e_ethdev_vf.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c
index 3fa25dc..74041ae 100644
--- a/drivers/net/i40e/i40e_ethdev.c
+++ b/drivers/net/i40e/i40e_ethdev.c
@@ -10593,7 +10593,7 @@ static void i40e_set_default_mac_addr(struct rte_eth_dev *dev,
 	struct i40e_pf *pf = I40E_DEV_PRIVATE_TO_PF(dev->data->dev_private);
 	struct rte_eth_dev_data *dev_data = pf->dev_data;
 	uint32_t frame_size = mtu + ETHER_HDR_LEN
-			      + ETHER_CRC_LEN + I40E_VLAN_TAG_SIZE;
+			      + ETHER_CRC_LEN + I40E_VLAN_TAG_SIZE * 2;
 	int ret = 0;
 
 	/* check if mtu is within the allowed range */
diff --git a/drivers/net/i40e/i40e_ethdev_vf.c b/drivers/net/i40e/i40e_ethdev_vf.c
index cb34023..ac81546 100644
--- a/drivers/net/i40e/i40e_ethdev_vf.c
+++ b/drivers/net/i40e/i40e_ethdev_vf.c
@@ -2688,7 +2688,7 @@ static int eth_i40evf_pci_remove(struct rte_pci_device *pci_dev)
 	struct i40e_vf *vf = I40EVF_DEV_PRIVATE_TO_VF(dev->data->dev_private);
 	struct rte_eth_dev_data *dev_data = vf->dev_data;
 	uint32_t frame_size = mtu + ETHER_HDR_LEN
-			      + ETHER_CRC_LEN + I40E_VLAN_TAG_SIZE;
+			      + ETHER_CRC_LEN + I40E_VLAN_TAG_SIZE * 2;
 	int ret = 0;
 
 	/* check if mtu is within the allowed range */
-- 
1.9.3