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[media] cxd2820r: fix gpio null pointer dereference 

Setting GPIOs during probe causes null pointer deference when
GPIOLIB was not selected by Kconfig. Initialize driver private
field before calling set gpios.

It is regressing bug since 4.9.

Fixes: 07fdf7d9f1 ("[media] cxd2820r: add I2C driver bindings")

Reported-by: Chris Rankin <rankincj@gmail.com>
Tested-by: Chris Rankin <rankincj@gmail.com>
Tested-by: Håkan Lennestål <hakan.lennestal@gmail.com>
Cc: <stable@vger.kernel.org> # v4.9+
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Antti Palosaari 2017-01-16 19:27:41 -02:00 committed by Mauro Carvalho Chehab
parent d40e98c13b
commit 0ffb94b6cc
1 changed files with 1 additions and 1 deletions
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2
drivers/media/dvb-frontends/cxd2820r_core.c
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@ -615,6 +615,7 @@ static int cxd2820r_probe(struct i2c_client *client,
}
priv->client[0] = client;
priv->fe.demodulator_priv = priv;
priv->i2c = client->adapter;
priv->ts_mode = pdata->ts_mode;
priv->ts_clk_inv = pdata->ts_clk_inv;
@ -697,7 +698,6 @@ static int cxd2820r_probe(struct i2c_client *client,
memcpy(&priv->fe.ops, &cxd2820r_ops, sizeof(priv->fe.ops));
if (!pdata->attach_in_use)
priv->fe.ops.release = NULL;
priv->fe.demodulator_priv = priv;
i2c_set_clientdata(client, priv);
/* Setup callbacks */