From: Zhu Tao <taox....@intel.com>

Qinq strip is not supported by i40e. When user tries to turn on
QinQ strip, the driver gives unsupported return value and log.

Signed-off-by: Zhu Tao <taox....@intel.com>
---
 drivers/net/i40e/i40e_ethdev.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c
index 77a46832c..ed8cbd849 100644
--- a/drivers/net/i40e/i40e_ethdev.c
+++ b/drivers/net/i40e/i40e_ethdev.c
@@ -3847,6 +3847,11 @@ i40e_vlan_offload_set(struct rte_eth_dev *dev, int mask)
        struct i40e_vsi *vsi = pf->main_vsi;
        struct rte_eth_rxmode *rxmode;
 
+       if (mask & ETH_QINQ_STRIP_MASK) {
+               PMD_DRV_LOG(ERR, "Strip qinq is not supported.");
+               return -ENOTSUP;
+       }
+
        rxmode = &dev->data->dev_conf.rxmode;
        if (mask & ETH_VLAN_FILTER_MASK) {
                if (rxmode->offloads & DEV_RX_OFFLOAD_VLAN_FILTER)
-- 
2.17.1

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