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 <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
diff --git a/drivers/media/dvb/frontends/tda827x.c b/drivers/media/dvb/frontends/tda827x.c
index 50adfb5..229b119 100644
--- a/drivers/media/dvb/frontends/tda827x.c
+++ b/drivers/media/dvb/frontends/tda827x.c
@@ -556,6 +556,11 @@
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");