netdev - Re: [PATCH net-next 7/7] net: phy: mdio-octeon: Cleanup module loading dependencies

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Date:   Mon, 6 Jul 2020 12:38:12 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     David Miller <davem@...emloft.net>,
        netdev <netdev@...r.kernel.org>,
        Florian Fainelli <f.fainelli@...il.com>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Sunil Goutham <sgoutham@...vell.com>,
        Robert Richter <rrichter@...vell.com>,
        Chris Packham <chris.packham@...iedtelesis.co.nz>
Subject: Re: [PATCH net-next 7/7] net: phy: mdio-octeon: Cleanup module
 loading dependencies

On Sun, Jul 05, 2020 at 08:29:21PM +0200, Andrew Lunn wrote:
> To ensure that the octoen MDIO driver has been loaded, the Cavium
> ethernet drivers reference a dummy symbol in the MDIO driver. This
> forces it to be loaded first. And this symbol has not been cleanly
> implemented, resulting in warnings when build W=1 C=1.
> 
> Since device tree is being used, and a phandle points to the PHY on
> the MDIO bus, we can make use of deferred probing. If the PHY fails to
> connect, it should be because the MDIO bus driver has not loaded
> yet. Return -EPROBE_DEFER so it will be tried again later.
> 
> Cc: Sunil Goutham <sgoutham@...vell.com>
> Cc: Robert Richter <rrichter@...vell.com>
> Cc: Chris Packham <chris.packham@...iedtelesis.co.nz>
> Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> Signed-off-by: Andrew Lunn <andrew@...n.ch>

Acked-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>