>> Updated the `get_ethertype_by_ptype` function to correctly parse VLAN
>> headers.

>You should describe what is broken and how.

I’ll handle in v2

>> Fixes: 76730c7b9b5a ("app/testpmd: use packet type parsing API")
>> Cc: haijie1@huawei.com

>Do you think it is critical for the release?

Yes, as it’s causing an infinite loop if you send a QinQ packet with csum fwd, and it will cause tested to get stuck forever.