From 255c1887ccca6cde4a2eac231623b925bf621540 Mon Sep 17 00:00:00 2001 From: Michael Krufky Date: Thu, 22 Nov 2007 14:40:25 -0300 Subject: [PATCH] V4L/DVB (6622): tda827x: prevent possible NULL pointer dereference in tda827xa_lna_gain If tda827x_config hasn't been defined, exit the function. Signed-off-by: Michael Krufky Signed-off-by: Mauro Carvalho Chehab --- drivers/media/dvb/frontends/tda827x.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/media/dvb/frontends/tda827x.c b/drivers/media/dvb/frontends/tda827x.c index 50adfb5395e..229b11987a5 100644 --- a/drivers/media/dvb/frontends/tda827x.c +++ b/drivers/media/dvb/frontends/tda827x.c @@ -556,6 +556,11 @@ static void tda827xa_lna_gain(struct dvb_frontend *fe, int high, struct i2c_msg msg = { .addr = priv->i2c_addr, .flags = 0, .buf = buf, .len = sizeof(buf) }; + if (NULL == priv->cfg) { + dprintk("tda827x_config not defined, cannot set LNA gain!\n"); + return; + } + if (priv->cfg->config) { if (high) dprintk("setting LNA to high gain\n"); -- 2.20.1