linux-kernel - Null pointer deference in drivers/power/pm2301

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Message-ID: <CAHuBVBb7B9UPiqZH0Y2MpMkUri02ApRMZfAwCctKG-tYnkbkSQ@mail.gmail.com>
Date:	Sat, 21 Sep 2013 04:25:51 +0300
From:	Valentin Ilie <eminemix@...il.com>
To:	anton@...msg.org, dwmw2@...radead.org, linux-kernel@...r.kernel.org
Subject: Null pointer deference in drivers/power/pm2301_charger.c

Hello,

I am trying to solve a NULL pointer deference in
drivers/power/pm2301_charger.c (and to submit a trivial patch) but I
am not sure how to do it.

Line 958 - 961
pm2 = (struct pm2xxx_charger*)i2c_get_clientdata(pm2xxx_i2c_client);
        if (!pm2) {
                dev_err(pm2->dev, "no pm2xxx_charger data supplied\n");

Line 976 - 978
pm2 = (struct pm2xxx_charger*)i2c_get_clientdata(pm2xxx_i2c_client);
        if (!pm2) {
                dev_err(pm2->dev, "no pm2xxx_charger data supplied\n");

As it can be clearly seen, pm2 is used with NULL value in dev_err. The
question is, how to fix this? Should I delete the dev_err line or can
I use printk (to avoid the need of a dev) ?

Thank you,
Valentin
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