[media] si2168: return error if set_frontend is called with invalid parameters

This patch should is based on Antti's silabs branch.

According to dvb-frontend.h set_frontend may be called with bandwidth_hz set to 0 if automatic bandwidth is required. Si2168 does not support automatic bandwidth and does not declare FE_CAN_BANDWIDTH_AUTO in caps.

This patch will change the behaviour in a way that EINVAL is returned if bandwidth_hz is 0.

Signed-off-by: Olli Salonen <olli.salonen@iki.fi>
Reviewed-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/drivers/media/dvb-frontends/si2168.c b/drivers/media/dvb-frontends/si2168.c
index 63341f485f9f..5b5fd5db7b2c 100644
--- a/drivers/media/dvb-frontends/si2168.c
+++ b/drivers/media/dvb-frontends/si2168.c
@@ -180,7 +180,10 @@ static int si2168_set_frontend(struct dvb_frontend *fe)
                 goto err;
         }
 
-        if (c->bandwidth_hz <= 5000000)
+        if (c->bandwidth_hz == 0) {
+                ret = -EINVAL;
+                goto err;
+        } else if (c->bandwidth_hz <= 5000000)
                 bandwidth = 0x05;
         else if (c->bandwidth_hz <= 6000000)
                 bandwidth = 0x06;