netdev - Re: [PATCH net v2] net: phy: Fix race condition on link status change

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Message-ID: <YnZ64cXE0ZRdHEbX@lunn.ch>
Date:   Sat, 7 May 2022 15:57:53 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Francesco Dolcini <francesco.dolcini@...adex.com>
Cc:     Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>,
        Joakim Zhang <qiangqing.zhang@....com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, netdev@...r.kernel.org,
        stable@...r.kernel.org
Subject: Re: [PATCH net v2] net: phy: Fix race condition on link status change

On Fri, May 06, 2022 at 08:08:15AM +0200, Francesco Dolcini wrote:
> This fixes the following error caused by a race condition between
> phydev->adjust_link() and a MDIO transaction in the phy interrupt
> handler. The issue was reproduced with the ethernet FEC driver and a
> micrel KSZ9031 phy.
> 
> Link: https://lore.kernel.org/all/20220422152612.GA510015@francesco-nb.int.toradex.com/
> Fixes: c974bdbc3e77 ("net: phy: Use threaded IRQ, to allow IRQ from sleeping devices")
> cc: <stable@...r.kernel.org>
> Signed-off-by: Francesco Dolcini <francesco.dolcini@...adex.com>

Reviewed-by: Andrew Lunn <andrew@...n.ch>

    Andrew