[PATCH net-next 11/12] net: hns3: add existence checking before adding unicast mac address

From: Jian Shen It's not allowed to add two same unicast mac address entries to the mac_vlan table. When modify the uc mac address of a VF device to the same value with the PF device's, the PF device will lose its entry of the mac_vlan table. Lookup the mac address in the

[PATCH net-next 11/12] net: hns3: add existence checking before adding unicast mac address

From: Jian Shen It's not allowed to add two same unicast mac address entries to the mac_vlan table. When modify the uc mac address of a VF device to the same value with the PF device's, the PF device will lose its entry of the mac_vlan table. Lookup the mac address in the mac_vlan table, and