netdev - Re: mtk_eth_soc for mt7621 won't work after 6.0-rc1

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Message-ID: <Yx+W9EoEfoRsq1rt@lore-desk>
Date:   Mon, 12 Sep 2022 22:30:44 +0200
From:   Lorenzo Bianconi <lorenzo@...nel.org>
To:     Arınç ÜNAL <arinc.unal@...nc9.com>
Cc:     netdev <netdev@...r.kernel.org>,
        Sergio Paracuellos <sergio.paracuellos@...il.com>
Subject: Re: mtk_eth_soc for mt7621 won't work after 6.0-rc1

> Hi Lorenzo,
> 
> On 12.09.2022 21:01, Lorenzo Bianconi wrote:
> > > > Ethernet for MT7621 SoCs no longer works after changes introduced to
> > > > mtk_eth_soc with 6.0-rc1. Ethernet interfaces initialise fine. Packets are
> > > > sent out from the interface fine but won't be received on the interface.
> > > > 
> > > > Tested with MT7530 DSA switch connected to gmac0 and ICPlus IP1001 PHY
> > > > connected to gmac1 of the SoC.
> > > > 
> > > > Last working kernel is 5.19. The issue is present on 6.0-rc5.
> > > > 
> > > > Arınç
> > > 
> > > Hi Arınç,
> > > 
> > > thx for testing and reporting the issue. Can you please identify
> > > the offending commit running git bisect?
> > > 
> > > Regards,
> > > Lorenzo
> > 
> > Hi Arınç,
> > 
> > just a small update. I tested a mt7621 based board (Buffalo WSR-1166DHP) with
> > OpenWrt master + my mtk_eth_soc series and it works fine. Can you please
> > provide more details about your development board/environment?
> 
> I've got a GB-PC2, Sergio has got a GB-PC1. We both use Neil's gnubee-tools
> which makes an image with filesystem and any Linux kernel of choice with
> slight modifications (maybe not at all) on the kernel.
> 
> https://github.com/neilbrown/gnubee-tools
> 
> Sergio experiences the same problem on GB-PC1.

ack, can you please run git bisect in order to identify the offending commit?
What is the latest kernel version that is working properly? 5.19.8?

Regards,
Lorenzo

> 
> Arınç

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