netdev - Re: net-next: new CL45 regression

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Date:   Mon, 4 Mar 2019 21:48:43 +0100
From:   Heiner Kallweit <hkallweit1@...il.com>
To:     "S-k, Shyam-sundar" <Shyam-sundar.S-k@....com>
Cc:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "Lendacky, Thomas" <Thomas.Lendacky@....com>,
        Florian Fainelli <f.fainelli@...il.com>,
        David Miller <davem@...emloft.net>
Subject: Re: net-next: new CL45 regression

On 04.03.2019 15:48, S-k, Shyam-sundar wrote:
> Hi Heiner,
> 
> We noticed that, the recent changes for CL45 in net-next tree causing regression on AMD platforms. The following is the commit:
> 
> 3ce2a02 net: phy: marvell10g: check for newly set aneg
> 
> Now, I see that, this code is moved to phy-c45.c with newer commit
> 
> 1af9f16 net: phy: add genphy_c45_check_and_restart_aneg
> 
> With this change, the link never comes up. Can you please a re-look once before it enters mainline?
> 
> Thanks,
> 
> Shyam
> 
Hi Shyam,

thanks for the report. However the description quite vague, therefore I'd appreciate the following details:

- The mentioned patch affects Marvell 10G PHY's only. Could you please provide:
  - exact PHY model you're using
  - interface mode you're using
  - link speed you expect and advertised speeds from both sides

- Some details regarding "AMD platform" would be helpful. What kind of board is it?

- There's a known issue in genphy_c45_an_config_aneg(), however I'm not sure whether it could be related
  to your issue. Could you please test the following patch whether it fixes the issue for you?
  https://patchwork.ozlabs.org/patch/1051291/

Heiner