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Message-ID: <ZIc1YJvUCsvX2+0p@shell.armlinux.org.uk>
Date: Mon, 12 Jun 2023 16:10:24 +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 04:06:32PM +0100, Russell King (Oracle) wrote:
> 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.
The other issue is, this will remain as zero until a driver has
successfully matched the device, which means as far as userspace
knowing what type of PHY it is (to find a driver) this doesn't
improve the situation.
I don't think this is a very good solution.
--
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