linux-kernel - Re: [PATCH net-next 1/3] net: phy: dp83869: Restart PHY when configuring mode

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Message-ID: <5936504.DvuYhMxLoT@fw-rgant>
Date: Tue, 04 Nov 2025 10:01:38 +0100
From: Romain Gantois <romain.gantois@...tlin.com>
To: "Russell King (Oracle)" <linux@...linux.org.uk>
Cc: Andrew Lunn <andrew@...n.ch>, Heiner Kallweit <hkallweit1@...il.com>,
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>,
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
 Maxime Chevallier <maxime.chevallier@...tlin.com>,
 Thomas Petazzoni <thomas.petazzoni@...tlin.com>, netdev@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject:
 Re: [PATCH net-next 1/3] net: phy: dp83869: Restart PHY when configuring mode

Hi Russell,

On Tuesday, 4 November 2025 09:57:59 CET Russell King (Oracle) wrote:
> On Tue, Nov 04, 2025 at 09:50:34AM +0100, Romain Gantois wrote:
> > The DP83869 PHY requires a software restart when the OP_MODE is changed.
...
> > @@ -797,6 +797,10 @@ static int dp83869_configure_mode(struct phy_device
> > *phydev,> 
> >  		return -EINVAL;
> >  	
> >  	}
> > 
> > +	ret = phy_write(phydev, DP83869_CTRL, DP83869_SW_RESTART);
> 
> So if dp83869_configure_fiber() returns an error, that doesn't matter?
> (This overwrites its error.)

That's a blunder on my part, thanks for pointing it out.

-- 
Romain Gantois, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com

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