netdev - Re: [PATCH] phylib: Make PHYs children of their MDIO bus, not the bus' parent.

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Message-ID: <564E3659.1040709@cogentembedded.com>
Date:	Thu, 19 Nov 2015 23:51:37 +0300
From:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:	David Daney <ddaney.cavm@...il.com>, netdev@...r.kernel.org,
	"David S. Miller" <davem@...emloft.net>,
	linux-kernel@...r.kernel.org,
	Florian Fainelli <f.fainelli@...il.com>
Cc:	David Daney <david.daney@...ium.com>,
	Lennert Buytenhek <buytenh@...tstofly.org>,
	Grant Likely <grant.likely@...retlab.ca>
Subject: Re: [PATCH] phylib: Make PHYs children of their MDIO bus, not the
 bus' parent.

Hello.

On 08/22/2015 02:16 AM, David Daney wrote:

> From: David Daney <david.daney@...ium.com>
>
> commit 18ee49ddb0d2 ("phylib: rename mii_bus::dev to mii_bus::parent")
> changed the parent of PHY devices from the bus to the bus parent.
>
> Then, commit 4dea547fef1b ("phylib: rework to prepare for OF
> registration of PHYs") moved the code into phy_device.c
>
> At this point, it is somewhat unclear why the change was seen as
> necessary.  But, when we look at the device model tree in
> /sys/devices, it is clearly incorrect.  The PHYs should be children of
> their MDIO bus.
>
> Change the PHY's parent device to be the MDIO bus device.
>
> Cc: Lennert Buytenhek <buytenh@...tstofly.org>
> Cc: Grant Likely <grant.likely@...retlab.ca>
> Signed-off-by: David Daney <david.daney@...ium.com>
> ---
>   drivers/net/phy/phy_device.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
> index 0302483..55f0178 100644
> --- a/drivers/net/phy/phy_device.c
> +++ b/drivers/net/phy/phy_device.c
> @@ -176,7 +176,7 @@ struct phy_device *phy_device_create(struct mii_bus *bus, int addr, int phy_id,
>   	if (c45_ids)
>   		dev->c45_ids = *c45_ids;
>   	dev->bus = bus;
> -	dev->dev.parent = bus->parent;
> +	dev->dev.parent = &bus->dev;
>   	dev->dev.bus = &mdio_bus_type;
>   	dev->irq = bus->irq != NULL ? bus->irq[addr] : PHY_POLL;
>   	dev_set_name(&dev->dev, PHY_ID_FMT, bus->id, addr);

    This patch makes my sh_eth driver fail to connect to PHY usinjg 
of_phy_connect(). (The ravb driver fails too but for some other reason.)

MBR, Sergei

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