Re: [PATCH] net: fec: Defer probe if other FEC has deferred MDIO

[Andrew Lunn <andrew@lunn.ch>]

> You are right, there is unfortunately no i.MX8 support in the upstream
> tree, so it's not possible to reproduce anything.

commit 947240ebcc635ab063f17ba027352c3a474d2438
Author: Fugang Duan <fugang.duan@nxp.com>
Date:   Wed Jul 28 19:51:59 2021 +0800

    net: fec: add imx8mq and imx8qm new versions support
    
    The ENET of imx8mq and imx8qm are basically the same as imx6sx,
    but they have new features support based on imx6sx, like:
    - imx8mq: supports IEEE 802.3az EEE standard.
    - imx8qm: supports RGMII mode delayed clock.

Are you using some other imx8 SoC?

> Just wanted to discuss the probe concept of this driver, which is
> rather fragile with all there static local variables, probe call
> counters and relying on the probe order. All of this falls together
> like a house of cards if something gets deferred.

I agree with the comments about it being fragile. It would be good to
get all the naming from OF nodes/addresses. But it needs doing by
somebody with access to a test farm of lots of different boards with
IMX2/5, IMX6 through to 8 and Vybrid.

    Andrew