linux-kernel - Re: [PATCH] I2c: busses - Fix possible NULL derefrence.

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Message-ID: <20170130071217.GG3585@ulmo.ba.sec>
Date:   Mon, 30 Jan 2017 08:12:17 +0100
From:   Thierry Reding <thierry.reding@...il.com>
To:     Shailendra Verma <shailendra.v@...sung.com>
Cc:     Laxman Dewangan <ldewangan@...dia.com>,
        Wolfram Sang <wsa@...-dreams.de>,
        Stephen Warren <swarren@...dotorg.org>,
        Alexandre Courbot <gnurou@...il.com>,
        linux-i2c@...r.kernel.org, linux-tegra@...r.kernel.org,
        linux-kernel@...r.kernel.org, p.shailesh@...sung.com,
        ashish.kalra@...sung.com,
        Shailendra Verma <shailendra.capricorn@...il.com>
Subject: Re: [PATCH] I2c: busses - Fix possible NULL derefrence.

On Mon, Jan 30, 2017 at 10:33:07AM +0530, Shailendra Verma wrote:
> of_device_get_match_data could return NULL, and so can cause
> a NULL pointer dereference later.
> 
> Signed-off-by: Shailendra Verma <shailendra.v@...sung.com>
> ---
>  drivers/i2c/busses/i2c-tegra.c |    4 ++++
>  1 file changed, 4 insertions(+)

This will never happen. Any match in the OF table that would cause the
->probe() to occur has a valid .data pointer associated with it.

Thierry

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