netdev - Re: [patch net-next RFC 04/12] dsa: set devlink port attrs for dsa ports

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Date:   Thu, 17 May 2018 12:14:32 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Jiri Pirko <jiri@...nulli.us>
Cc:     Andrew Lunn <andrew@...n.ch>, netdev@...r.kernel.org,
        davem@...emloft.net, idosch@...lanox.com,
        jakub.kicinski@...ronome.com, mlxsw@...lanox.com,
        vivien.didelot@...oirfairelinux.com, michael.chan@...adcom.com,
        ganeshgr@...lsio.com, saeedm@...lanox.com,
        simon.horman@...ronome.com, pieter.jansenvanvuuren@...ronome.com,
        john.hurley@...ronome.com, dirk.vandermerwe@...ronome.com,
        alexander.h.duyck@...el.com, ogerlitz@...lanox.com,
        dsahern@...il.com, vijaya.guvva@...ium.com,
        satananda.burla@...ium.com, raghu.vatsavayi@...ium.com,
        felix.manlunas@...ium.com, gospo@...adcom.com,
        sathya.perla@...adcom.com, vasundhara-v.volam@...adcom.com,
        tariqt@...lanox.com, eranbe@...lanox.com,
        jeffrey.t.kirsher@...el.com
Subject: Re: [patch net-next RFC 04/12] dsa: set devlink port attrs for dsa
 ports

On 05/17/2018 10:39 AM, Jiri Pirko wrote:
>>> That is compiled inside "fixed_phy", isn't it?
>>
>> It matches what CONFIG_FIXED_PHY is, so if it's built-in it also becomes
>> built-in, if is modular, it is also modular, this was fixed with
>> 40013ff20b1beed31184935fc0aea6a859d4d4ef ("net: dsa: Fix functional
>> dsa-loop dependency on FIXED_PHY")
> 
> Now I have it compiled as module, and after modprobe dsa_loop I see:
> [ 1168.129202] libphy: Fixed MDIO Bus: probed
> [ 1168.222716] dsa-loop fixed-0:1f: DSA mockup driver: 0x1f
> 
> This messages I did not see when I had fixed_phy compiled as buildin.
> 
> But I still see no netdevs :/

The platform data assumes there is a network device named "eth0" as the
parent device, yes I know this is terrible, but unfortunately we don't
have anything better at this point, though that could certainly change
that to take a proper struct device reference in the future.

I am assuming that you don't have such a network device named "eth0" in
your system? You can also look at the less than 360 LOCs of the driver
and find out where your problem is, this is not mlxsw :)
-- 
Florian