linux-kernel - Re: [PATCH net-next 6/6] net: phy: dp83869: Fix link up reporting in SGMII bridge mode

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Message-ID: <ZoPII06HRwBpjVVs@shell.armlinux.org.uk>
Date: Tue, 2 Jul 2024 10:28:03 +0100
From: "Russell King (Oracle)" <linux@...linux.org.uk>
To: Romain Gantois <romain.gantois@...tlin.com>
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>,
	Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next 6/6] net: phy: dp83869: Fix link up reporting in
 SGMII bridge mode

On Tue, Jul 02, 2024 at 11:04:37AM +0200, Romain Gantois wrote:
> This raises the question of a potential race condition when reading
> mod_phy->{link, speed, duplex}. I haven't seen any kind of locking used in
> other parts of the net subsystem when reading these parameters.

Drivers access these under phydev->lock due to a callback from phylib
which will be made from the state machine which holds that lock.
This includes phylink.

-- 
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