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Date:   Mon, 5 Oct 2020 11:29:06 +0300
From:   Sergei Shtylyov <sergei.shtylyov@...il.com>
To:     Pavel Machek <pavel@...x.de>, ashiduka@...itsu.com,
        davem@...emloft.net, yoshihiro.shimoda.uh@...esas.com,
        damm+renesas@...nsource.se, tho.vu.wh@....renesas.com,
        kazuya.mizuguchi.ks@...esas.com, horms+renesas@...ge.net.au,
        fabrizio.castro@...renesas.com, netdev@...r.kernel.org
Cc:     Chris.Paterson2@...esas.com
Subject: Re: ravb ethernet failures in 4.19.148 and -cip kernels

Hello!

On 05.10.2020 0:24, Pavel Machek wrote:

> It seems
> 
> commit fb3a780e7a76cf8efb055f8322ec039923cee41f
> Author: Yuusuke Ashizuka <ashiduka@...itsu.com>
> Date:   Thu Aug 20 18:43:07 2020 +0900
> 
>      ravb: Fixed to be able to unload modules
> 
> causes problems in at least -cip-rt kernels. (I'd have to verify it is
> present in -cip and plain -stable). Symptoms are like this:
> 
> [    2.798301] [drm] Cannot find any crtc or sizes
> [    2.805866] hctosys: unable to open rtc device (rtc0)
> [    2.811937] libphy: ravb_mii: probed
> [    2.821001] RTL8211E Gigabit Ethernet e6800000.ethernet-ffffffff:00: attached PHY driver [RTL8211E Gigabit Ethernet] (mii_bus:phy_addr=e6800000.ethernet-ffffffff:00, irq=190)
> [    2.838052] RTL8211E Gigabit Ethernet e6800000.ethernet-ffffffff:00: Master/Slave resolution failed, maybe conflicting manual settings?
> [   12.841484] Waiting up to 110 more seconds for network.
> [   22.853482] Waiting up to 100 more seconds for network.
> [   32.865482] Waiting up to 90 more seconds for network.
> [   42.877482] Waiting up to 80 more seconds for network.
> [   52.889482] Waiting up to 70 more seconds for network.
> [   62.901482] Waiting up to 60 more seconds for network.
> [   72.913482] Waiting up to 50 more seconds for network.
> [   82.925482] Waiting up to 40 more seconds for network.
> [   92.937482] Waiting up to 30 more seconds for network.
> [  102.949482] Waiting up to 20 more seconds for network.
> [  112.961482] Waiting up to 10 more seconds for network.
> [  122.861490] Sending DHCP requests ...... timed out!
> [  209.890289] IP-Config: Retrying forever (NFS root)...
> [  209.895535] libphy: ravb_mii: probed
> [  209.899386] mdio_bus e6800000.ethernet-ffffffff: MDIO device at address 0 is missing.
> [  209.910604] ravb e6800000.ethernet eth0: failed to connect PHY
> [  209.916705] IP-Config: Failed to open eth0
> [  219.925483] Waiting up to 110 more seconds for network.
> [  229.937481] Waiting up to 100 more seconds for network.
> [  239.949481] Waiting up to 90 more seconds for network.
> [  249.961481] Waiting up to 80 more seconds for network.
> 
> Full log is available at
> https://lava.ciplatform.org/scheduler/job/56398 .
> 
> Reverting the above patch fixes the problems.

    Geert has already reverted that patch:

https://patchwork.ozlabs.org/project/netdev/patch/20200922072931.2148-1-geert+renesas@glider.be/

> If you have any ideas what could be going on there, let me know.

    Unfortunately, I'm unfamiliar with the Realtek PHY driver...

> Best regards,
> 									Pavel

MBR, Sergei

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