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

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Message-ID: <20170130071020.GE3585@ulmo.ba.sec>
Date:   Mon, 30 Jan 2017 08:10:20 +0100
From:   Thierry Reding <thierry.reding@...il.com>
To:     Shailendra Verma <shailendra.v@...sung.com>
Cc:     Maxime Ripard <maxime.ripard@...e-electrons.com>,
        Chen-Yu Tsai <wens@...e.org>,
        Stephen Warren <swarren@...dotorg.org>,
        Alexandre Courbot <gnurou@...il.com>,
        linux-pwm@...r.kernel.org, linux-arm-kernel@...ts.infradead.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] pwm - Fix possible NULL derefrence.

On Mon, Jan 30, 2017 at 10:22:33AM +0530, Shailendra Verma wrote:
> of_match_device could return NULL, and so can cause a NULL
> pointer dereference later.
> 
> Signed-off-by: Shailendra Verma <shailendra.v@...sung.com>
> ---
>  drivers/pwm/pwm-sun4i.c |    4 ++++
>  drivers/pwm/pwm-tegra.c |    5 +++++
>  2 files changed, 9 insertions(+)

Both of these drivers will only run on purely OF systems, so this check
is unnecessary.

Thierry

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