netdev - Re: [PATCH net] net: dsa: mt7530: don't change PVC_EG

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Date:   Mon, 6 Feb 2023 02:02:48 +0300
From:   Arınç ÜNAL <arinc.unal@...nc9.com>
To:     Vladimir Oltean <vladimir.oltean@....com>
Cc:     netdev@...r.kernel.org, "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Sean Wang <sean.wang@...iatek.com>,
        Landen Chao <Landen.Chao@...iatek.com>,
        DENG Qingfang <dqfext@...il.com>, Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org,
        Frank Wunderlich <frank-w@...lic-files.de>,
        erkin.bozoglu@...ont.com, richard@...terhints.com
Subject: Re: [PATCH net] net: dsa: mt7530: don't change PVC_EG_TAG when CPU
 port becomes VLAN-aware

Hey Vladimir,

On 5.02.2023 23:39, Vladimir Oltean wrote:
> Hi Arınç,
> 
> On Sun, Feb 05, 2023 at 10:25:27PM +0300, Arınç ÜNAL wrote:
>> Unrelated to this, as in it existed before this patch, port@0 hasn't been
>> working at all on my MT7621AT Unielec U7621-06 board and MT7623NI Bananapi
>> BPI-R2.
>>
>> Packets are sent out from master eth1 fine, the computer receives them.
>> Frames are received on eth1 but nothing shows on the DSA slave interface of
>> port@0. Sounds like malformed frames are received on eth1.
> 
> I need to ask, how do the packets look like on the RX path of the DSA
> master, as seen by tcpdump -i eth1 -e -n -Q in -XX? If they aren't
> received, can you post consecutive outputs from ethtool -S eth1 | grep -v ': 0',
> to see what (error) counter increments?

I appreciate your effort on this. I've put it in the attachments to 
avoid column limit on the Thunderbird mail client. Ping runs on the 
device. Packet capture on the other side is attached.

Arınç
View attachment "tcpdump-ethtool-output.txt" of type "text/plain" (7285 bytes)

Download attachment "arp-frames.pcapng" of type "application/x-pcapng" (4472 bytes)