netdev - Re: [PATCH net] phy: mscc: Fix when PTP clock is register and unregister

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Message-ID: <20250825061424.zme43qi7hnyqa7rs@DEN-DL-M31836.microchip.com>
Date: Mon, 25 Aug 2025 08:14:24 +0200
From: Horatiu Vultur <horatiu.vultur@...rochip.com>
To: Jakub Kicinski <kuba@...nel.org>
CC: Vadim Fedorenko <vadim.fedorenko@...ux.dev>, <andrew@...n.ch>,
	<hkallweit1@...il.com>, <linux@...linux.org.uk>, <davem@...emloft.net>,
	<edumazet@...gle.com>, <pabeni@...hat.com>, <richardcochran@...il.com>,
	<vladimir.oltean@....com>, <rmk+kernel@...linux.org.uk>, <rosenp@...il.com>,
	<christophe.jaillet@...adoo.fr>, <viro@...iv.linux.org.uk>,
	<atenart@...nel.org>, <quentin.schulz@...tlin.com>, <netdev@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH net] phy: mscc: Fix when PTP clock is register and
 unregister

The 08/22/2025 15:58, Jakub Kicinski wrote:
> 
> On Fri, 22 Aug 2025 08:27:26 +0200 Horatiu Vultur wrote:
> > > > +void vsc8584_ptp_deinit(struct phy_device *phydev)
> > > > +{
> > > > +     switch (phydev->phy_id & phydev->drv->phy_id_mask) {
> > > > +     case PHY_ID_VSC8572:
> > > > +     case PHY_ID_VSC8574:
> > > > +     case PHY_ID_VSC8575:
> > > > +     case PHY_ID_VSC8582:
> > > > +     case PHY_ID_VSC8584:
> > > > +             return __vsc8584_deinit_ptp(phydev);
> > >
> > > void function has no return value. as well as it shouldn't return
> > > anything. I'm not quite sure why do you need __vsc8584_deinit_ptp()
> > > at all, I think everything can be coded inside vsc8584_ptp_deinit()
> >
> > I understand, I can update not to return anything.
> 
> It does look a little unnecessary.
> 
> > Regarding __vsc8584_deinit_ptp, I have created that function just to be
> > similar with the __vsc8584_init_ptp.
> 
> Alternatively you could only deinit if the clock pointer is valid,
> regardless of chip id. Unclear which one is the cleanest form, TBH.

I will update in the next version to check if the
vsc8531->ptp->ptp_clock is valid and in that case call
ptp_clock_unregister and skb_queue_purge.


-- 
/Horatiu