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From: Andrew Lunn <andrew@lunn.ch>
To: 李广硕 <liguangshuo@mail.sdu.edu.cn>
Cc: Heiner Kallweit <hkallweit1@gmail.com>,
	Russell King <linux@armlinux.org.uk>,
	"David S. Miller" <davem@davemloft.net>,
	Eric Dumazet <edumazet@kernel.org>,
	Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
	netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: Re: [PATCH net] net: phy: micrel: Fix potential shared PHC use-after-free
Date: Mon, 9 Nov 2026 14:24:33 +0100	[thread overview]
Message-ID: <198e6702-0663-4183-9aaf-0fa4082dbf79@lunn.ch> (raw)
In-Reply-To: <AHAASAAGLPGJfVjn9skPJKoS.3.1794229559658.Hmail.202321181@mail.sdu.edu.cn>

> >.probe() and .remove() should be opposites of each other. What happens
> >if you do that?
> >
> >    Andrew
> >
> >---
> >pw-bot: cr
> >
> 
> On LAN8814, one PHY registers the shared PHC and owns its pin array.
> If that PHY unregisters the clock in .remove(), the clock goes away
> before the pins are freed. If another port is still bound, it loses
> access to the PHC. I added the handoff in v1 to keep the clock
> available in that case.
> 
> I'll rework this around the PHY that registered the clock. I'll check
> how the remaining ports report the PHC after that PHY unbinds, and
> what happens if it binds again while another port is still up.

That is not what i asked for:

.probe() and .remove() should be opposites of each other.

Take the probe function and reverse the order of the lines.

Then reverse what each function does.

	Andrew

  reply	other threads:[~2026-11-09 13:24 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-11-07  6:54 Guangshuo Li
2026-11-07 14:40 ` Andrew Lunn
2026-11-09 13:05   ` 李广硕
2026-11-09 13:24     ` Andrew Lunn [this message]
2026-11-08  7:15 ` netdev-bot+sashiko

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