linux-kernel - Re: [PATCH net-next v1 1/1] net: phy: at803x: fix NULL pointer dereference on AR9331 PHY

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Date:   Thu, 16 Jun 2022 17:33:56 +0200
From:   Oleksij Rempel <o.rempel@...gutronix.de>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     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>, kernel@...gutronix.de,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH net-next v1 1/1] net: phy: at803x: fix NULL pointer
 dereference on AR9331 PHY

On Thu, Jun 16, 2022 at 03:38:15PM +0200, Andrew Lunn wrote:
> On Thu, Jun 16, 2022 at 01:31:05PM +0200, Oleksij Rempel wrote:
> > Latest kernel will explode on the PHY interrupt config, since it depends
> > now on allocated priv. So, run probe to allocate priv to fix it.
> > 
> > Fixes: 3265f4218878 ("net: phy: at803x: add fiber support")
> > Signed-off-by: Oleksij Rempel <o.rempel@...gutronix.de>
> > ---
> >  drivers/net/phy/at803x.c | 2 ++
> >  1 file changed, 2 insertions(+)
> > 
> > diff --git a/drivers/net/phy/at803x.c b/drivers/net/phy/at803x.c
> > index 6a467e7817a6..b72a807f2e03 100644
> > --- a/drivers/net/phy/at803x.c
> > +++ b/drivers/net/phy/at803x.c
> > @@ -2072,6 +2072,8 @@ static struct phy_driver at803x_driver[] = {
> >  	/* ATHEROS AR9331 */
> >  	PHY_ID_MATCH_EXACT(ATH9331_PHY_ID),
> >  	.name			= "Qualcomm Atheros AR9331 built-in PHY",
> > +	.probe			= at803x_probe,
> > +	.remove			= at803x_remove,
> >  	.suspend		= at803x_suspend,
> >  	.resume			= at803x_resume,
> >  	.flags			= PHY_POLL_CABLE_TEST,
> 
> Is the same change needed for some of the other PHYs? QCA8081?
> QCA9561?

Yes, good point.

Regards,
Oleksij
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