Subject: Re: DPAA Ethernet traffice troubles with Linux kernel

From: Andrew Lunn <[email-masked]>
Date: Tue, 16 Jan 2018 15:38:36 +0100

> Hi, just saw this and thought of a small patch I just wrote for mdio bus, o idea
> if it is relevant but here goes:
> 
> From fe0b98d54a79779482700676331b4d10a0f3cada Mon Sep 17 00:00:00 2001
> From: Joakim Tjernlund <[email-masked]>
> Date: Sun, 14 Jan 2018 21:27:20 +0100
> Subject: [PATCH] of_mdiobus_register: Continue after error
> 
> of_mdiobus_register unregister itself if one phy fails to register
> which is bad for system having all its PHYs on the same MDIO bus.
> Just log the error and continue with the remaining PHYs instead.
> 
> Signed-off-by: Joakim Tjernlund <[email-masked]>

Hi Joakim

You appear to be using an old kernel. Take a look at:

commit 95f566de0269a0c59fd6a737a147731302136429
Author: Madalin Bucur <[email-masked]>
Date:   Tue Jan 9 14:43:34 2018 +0200

    of_mdio: avoid MDIO bus removal when a PHY is missing
    
    If one of the child devices is missing the of_mdiobus_register_phy()
    call will return -ENODEV. When a missing device is encountered the
    registration of the remaining PHYs is stopped and the MDIO bus will
    fail to register. Propagate all errors except ENODEV to avoid it.
    
    Signed-off-by: Madalin Bucur <[email-masked]>
    Reviewed-by: Andrew Lunn <[email-masked]>
    Signed-off-by: David S. Miller <[email-masked]>

    Andrew