netdev - Re: BUG: "13d0ab6750b2 net: phy: check return code when requesting PHY driver module" breaks NFS-Root

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Date:   Mon, 11 Mar 2019 11:11:11 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Marc Kleine-Budde <mkl@...gutronix.de>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        ptx kernel <kernel@...gutronix.de>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Andrew Lunn <andrew@...n.ch>
Subject: Re: BUG: "13d0ab6750b2 net: phy: check return code when requesting
 PHY driver module" breaks NFS-Root

On 3/11/19 11:04 AM, Marc Kleine-Budde wrote:
> On 3/11/19 1:23 PM, Marc Kleine-Budde wrote:
>> Hello,
>>
>> I'm on next-next/master and noticed that the following patch:
>>
>> | 13d0ab6750b2 net: phy: check return code when requesting PHY
>> |              driver module
>>
>> breaks NFS Root for my embedded device (riotboard). The kernel dhcp
>> fails to get an address and thus no NFS Root.
> 
> Just noticed that problem was fixed by commit:
> 
> | 21e194425abd net: phy: fix issue with loading PHY driver w/o initramfs
> 
> I continued bisecting and found a bad commit in the riotboard's phy
> driver. I'll send a separate mail for this.
> 
> | cd28d1d6e52e net: phy: at803x: Disable phy delay for RGMII mode

If your problem is with this driver, keep in mind that the at803x PHY
driver incorrectly acted on the 'phy-mode'/phy_interface_t type and you
may need DTS changes to be conforming. Of course, there is no way to
programmatically detect any of that, which adds to the fun.
-- 
Florian