netdev - Re: [PATCH] net: phy: Add sysfs attribute for PHY c45 identifiers.

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Message-ID: <ZIc0d48xURaZzZc/@shell.armlinux.org.uk>
Date: Mon, 12 Jun 2023 16:06:31 +0100
From: "Russell King (Oracle)" <linux@...linux.org.uk>
To: Jianhui Zhao <zhaojh329@...il.com>
Cc: andrew@...n.ch, davem@...emloft.net, edumazet@...gle.com,
	hkallweit1@...il.com, kuba@...nel.org, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org, pabeni@...hat.com
Subject: Re: [PATCH] net: phy: Add sysfs attribute for PHY c45 identifiers.

On Mon, Jun 12, 2023 at 10:04:26PM +0800, Jianhui Zhao wrote:
> diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
> index 17d0d0555a79..81a4bc043ee2 100644
> --- a/drivers/net/phy/phy_device.c
> +++ b/drivers/net/phy/phy_device.c
> @@ -541,8 +541,10 @@ static int phy_bus_match(struct device *dev, struct device_driver *drv)
>  
>  			if ((phydrv->phy_id & phydrv->phy_id_mask) ==
>  			    (phydev->c45_ids.device_ids[i] &
> -			     phydrv->phy_id_mask))
> +			     phydrv->phy_id_mask)) {
> +				phydev->phy_id = phydev->c45_ids.device_ids[i];
>  				return 1;
> +			}
>  		}
>  		return 0;
>  	} else {
> 
> How about modifying it like this?

No - there are C45 PHYs where the ID in each MMD are different. 88x3310
is one such example. If we're going to report any of them, we should
report all of them.

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