netdev - Re: [PATCH net-next 1/2] net: mdio: of: fix potential NULL pointer derefernce

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Message-ID: <20200131051734.GA1398@localhost>
Date:   Thu, 30 Jan 2020 21:17:34 -0800
From:   Richard Cochran <richardcochran@...il.com>
To:     Michael Walle <michael@...le.cc>
Cc:     linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        Russell King <linux@...linux.org.uk>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Andrew Lunn <andrew@...n.ch>
Subject: Re: [PATCH net-next 1/2] net: mdio: of: fix potential NULL pointer
 derefernce

On Thu, Jan 30, 2020 at 06:44:50PM +0100, Michael Walle wrote:
> of_find_mii_timestamper() returns NULL if no timestamper is found.
> Therefore, guard the unregister_mii_timestamper() calls.
> 
> Fixes: 1dca22b18421 ("net: mdio: of: Register discovered MII time stampers.")
> Signed-off-by: Michael Walle <michael@...le.cc>

Good catch.

Acked-by: Richard Cochran <richardcochran@...il.com>