netdev - Re: [PATCH v3 net] net: phy: fixed_phy: fix missing calls to gpiod_put in fixed_mdio_bus

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Message-ID: <aK98Nq-rauPoRXJP@shell.armlinux.org.uk>
Date: Wed, 27 Aug 2025 22:44:22 +0100
From: "Russell King (Oracle)" <linux@...linux.org.uk>
To: Florian Fainelli <f.fainelli@...il.com>
Cc: Heiner Kallweit <hkallweit1@...il.com>, Andrew Lunn <andrew@...n.ch>,
	Andrew Lunn <andrew+netdev@...n.ch>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Eric Dumazet <edumazet@...gle.com>,
	David Miller <davem@...emloft.net>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: [PATCH v3 net] net: phy: fixed_phy: fix missing calls to
 gpiod_put in fixed_mdio_bus_exit

On Wed, Aug 27, 2025 at 02:14:54PM -0700, Florian Fainelli wrote:
> On 8/27/25 14:09, Russell King (Oracle) wrote:
> > On Wed, Aug 27, 2025 at 11:02:55PM +0200, Heiner Kallweit wrote:
> > > Cleanup in fixed_mdio_bus_exit() misses to call gpiod_put().
> > > Easiest fix is to call fixed_phy_del() for each possible phy address.
> > > This may consume a few cpu cycles more, but is much easier to read.
> > > 
> > > Fixes: a5597008dbc2 ("phy: fixed_phy: Add gpio to determine link up/down.")
> > 
> > Here's a question that should be considered as well. Do we still need
> > to keep the link-gpios for fixed-phy?
> > 
> > $ grep -r link-gpios arch/*/boot/dts/
> > arch/arm/boot/dts/nxp/vf/vf610-zii-dev-rev-b.dts:                              link-gpios = <&gpio6 2
> > arch/arm/boot/dts/nxp/vf/vf610-zii-dev-rev-b.dts:                              link-gpios = <&gpio6 3
> > 
> > These are used with the mv88e6xxx DSA switch, and DSA being fully
> > converted to phylink, means that fixed-phy isn't used for these
> > link-gpios properties, and hasn't been for some time.
> > 
> > So, is this now redundant code that can be removed, or should we
> > consider updating it for another kernel cycle but print a deprecation
> > notice should someone use it (e.g. openwrt.)
> > 
> > Should we also describe the SFF modules on Zii rev B properly?
> > 
> 
> Do we need to maintain the ZII Device Tree sources given that there has not
> been any work done on those, and it's unclear if they are still even as
> useful as they once were?

Last time I booted mine was in April, because it's the only way I can
test a greater range of Marvell DSA switches. So yes, it gets used
for testing here.

-- 
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