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authorMichael Krufky <mkrufky@linuxtv.org>2007-11-22 14:40:25 -0300
committerMauro Carvalho Chehab <mchehab@infradead.org>2008-01-25 19:02:17 -0200
commit255c1887ccca6cde4a2eac231623b925bf621540 (patch)
tree09cf5dbf4431a85347b0e28a872b989c362b47be /drivers/media/dvb
parent3b0c453aa78be253b4414cd337c9975f91e2c894 (diff)
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>
Diffstat (limited to 'drivers/media/dvb')
-rw-r--r--drivers/media/dvb/frontends/tda827x.c5
1 files changed, 5 insertions, 0 deletions
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");