netdev - Re: [PATCH net-next v2 7/7] net: phy: smsc: Cope with hot-removal in interrupt handler

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Message-ID: <YnGsKQC1WxihasYs@lunn.ch>
Date:   Wed, 4 May 2022 00:26:49 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Lukas Wunner <lukas@...ner.de>
Cc:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, netdev@...r.kernel.org,
        linux-usb@...r.kernel.org,
        Steve Glendinning <steve.glendinning@...well.net>,
        UNGLinuxDriver@...rochip.com, Oliver Neukum <oneukum@...e.com>,
        Andre Edich <andre.edich@...rochip.com>,
        Oleksij Rempel <linux@...pel-privat.de>,
        Martyn Welch <martyn.welch@...labora.com>,
        Gabriel Hojda <ghojda@...urs.ro>,
        Christoph Fritz <chf.fritz@...glemail.com>,
        Lino Sanfilippo <LinoSanfilippo@....de>,
        Philipp Rosenberger <p.rosenberger@...bus.com>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>,
        Ferry Toth <fntoth@...il.com>
Subject: Re: [PATCH net-next v2 7/7] net: phy: smsc: Cope with hot-removal in
 interrupt handler

On Tue, May 03, 2022 at 03:15:07PM +0200, Lukas Wunner wrote:
> If reading the Interrupt Source Flag register fails with -ENODEV, then
> the PHY has been hot-removed and the correct response is to bail out
> instead of throwing a WARN splat and attempting to suspend the PHY.
> The PHY should be stopped in due course anyway as the kernel
> asynchronously tears down the device.
> 
> Tested-by: Oleksij Rempel <o.rempel@...gutronix.de> # LAN9514/9512/9500
> Tested-by: Ferry Toth <fntoth@...il.com> # LAN9514
> Signed-off-by: Lukas Wunner <lukas@...ner.de>

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

    Andrew