netdev - Re: [PATCH 2/3] net: phy: set the of_node in the mdiodev's struct device

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Date:   Tue, 19 Jun 2018 09:55:54 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Bartosz Golaszewski <brgl@...ev.pl>,
        Grygorii Strashko <grygorii.strashko@...com>,
        "David S . Miller" <davem@...emloft.net>,
        Dan Carpenter <dan.carpenter@...cle.com>,
        Ivan Khoronzhuk <ivan.khoronzhuk@...aro.org>,
        Rob Herring <robh@...nel.org>, Lukas Wunner <lukas@...ner.de>,
        Kevin Hilman <khilman@...nel.org>,
        David Lechner <david@...hnology.com>,
        Sekhar Nori <nsekhar@...com>, Andrew Lunn <andrew@...n.ch>
Cc:     linux-omap@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Bartosz Golaszewski <bgolaszewski@...libre.com>
Subject: Re: [PATCH 2/3] net: phy: set the of_node in the mdiodev's struct
 device

On 06/19/2018 09:09 AM, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bgolaszewski@...libre.com>
> 
> Copy the of_node over from mii_bus's struct device. This is needed
> for device-tree systems to be able to check the mdio device's
> compatible string.
> 
> Signed-off-by: Bartosz Golaszewski <bgolaszewski@...libre.com>
> ---
>  drivers/net/phy/phy_device.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
> index bd0f339f69fd..a92d5ee61813 100644
> --- a/drivers/net/phy/phy_device.c
> +++ b/drivers/net/phy/phy_device.c
> @@ -411,6 +411,7 @@ struct phy_device *phy_device_create(struct mii_bus *bus, int addr, int phy_id,
>  	mdiodev->dev.parent = &bus->dev;
>  	mdiodev->dev.bus = &mdio_bus_type;
>  	mdiodev->dev.type = &mdio_bus_phy_type;
> +	mdiodev->dev.of_node = bus->dev.of_node;

That does not quite make sense to me, the mdio device's parent already
points to &bus->dev, which would get you the correct of_node. You are
breaking the parent/child relationship here. From patch 3, see my
comments there, it does not look like you are matching on the right
device level.

>  	mdiodev->bus = bus;
>  	mdiodev->bus_match = phy_bus_match;
>  	mdiodev->addr = addr;
> 


-- 
Florian