[PATCH] net/i40e: fix single VLAN cannot work normal

[Jiale, SongX]

> -----Original Message-----
> From: Kevin Liu <kevinx.liu at intel.com>
> Sent: Friday, August 19, 2022 12:04 AM
> To: dev at dpdk.org
> Cc: Zhang, Yuying <yuying.zhang at intel.com>; Xing, Beilei
> <beilei.xing at intel.com>; Yang, SteveX <stevex.yang at intel.com>; Liu, KevinX
> <kevinx.liu at intel.com>
> Subject: [PATCH] net/i40e: fix single VLAN cannot work normal
> 
> After disable QinQ, single VLAN can not work normal.
> The reason is that QinQ is not disabled correctly.
> 
> Before configuring QinQ, need to back up and clean MAC/VLAN filters of all
> ports. After configuring QinQ, restore MAC/VLAN filters of all ports. When
> disable QinQ, need to set valid_flags to 0x0008 and set first_tag to 0x88a8.
> 
> Signed-off-by: Kevin Liu <kevinx.liu at intel.com>
> ---
Tested-by: Jiale Song < songx.jiale at intel.com>