V4L/DVB (3388): Ignore DiSEqC messages > 6 and < 3
Ignore invalid messages on cx24110 frontend.
Thanks to Edgar Toernig
Signed-off-by: Manu Abraham <manu@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
diff --git a/drivers/media/dvb/frontends/cx24110.c b/drivers/media/dvb/frontends/cx24110.c
index d15d32c..cc68b7e 100644
--- a/drivers/media/dvb/frontends/cx24110.c
+++ b/drivers/media/dvb/frontends/cx24110.c
@@ -418,6 +418,9 @@
struct cx24110_state *state = fe->demodulator_priv;
unsigned long timeout;
+ if (cmd->msg_len < 3 || cmd->msg_len > 6)
+ return -EINVAL; /* not implemented */
+
for (i = 0; i < cmd->msg_len; i++)
cx24110_writereg(state, 0x79 + i, cmd->msg[i]);