linux-kernel - Re: [PATCH v2 3/3] net: ethernet: add ag71xx driver

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Date:   Mon, 22 Apr 2019 07:13:49 +0200
From:   Oleksij Rempel <o.rempel@...gutronix.de>
To:     David Miller <davem@...emloft.net>
Cc:     paul.burton@...s.com, ralf@...ux-mips.org, jhogan@...nel.org,
        robh+dt@...nel.org, jcliburn@...il.com, chris.snook@...il.com,
        mark.rutland@....com, kernel@...gutronix.de,
        linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, john@...ozen.org, nbd@....name,
        netdev@...r.kernel.org
Subject: Re: [PATCH v2 3/3] net: ethernet: add ag71xx driver

Hi,

On Fri, Apr 19, 2019 at 02:35:19PM -0700, David Miller wrote:
> From: Oleksij Rempel <o.rempel@...gutronix.de>
> Date: Thu, 18 Apr 2019 07:26:20 +0200
> 
> > +static int ag71xx_remove(struct platform_device *pdev)
> > +{
> > +	struct net_device *ndev = platform_get_drvdata(pdev);
> > +	struct ag71xx *ag;
> > +
> > +	if (!ndev)
> > +		return 0;
> > +
> > +	ag = netdev_priv(ndev);
> > +	ag71xx_phy_disconnect(ag);
> > +	ag71xx_mdio_remove(ag);
> > +	unregister_netdev(ndev);
> > +	platform_set_drvdata(pdev, NULL);
> > +
> > +	return 0;
> > +}
> 
> You should unregister the netdev before you disconnect the PHY and remove
> the MDIO.

ok.

> Also you need to call free_netdev() afterwards otherwise you will leak it.

ndev is allocated with devm_alloc_etherdev(). Are you sure free_netdev()
should be used here?

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