[media] radio-si4713: fix g/s_frequency

- check for invalid modulators.
- clamp frequency to valid range.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Eduardo Valentin <edubezval@gmail.com>
Tested-by: Eduardo Valentin <edubezval@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 7 insertions, 3 deletions

diff --git a/drivers/media/radio/si4713-i2c.c b/drivers/media/radio/si4713-i2c.c
index 1cb9a2e7f683..56c9241ee7fb 100644
--- a/drivers/media/radio/si4713-i2c.c
+++ b/drivers/media/radio/si4713-i2c.c
@@ -1261,6 +1261,7 @@ static int si4713_setup(struct si4713_device *sdev)
         rval |= si4713_set_rds_radio_text(sdev, tmp->rds_info.radio_text);
 
         /* Device procedure needs to set frequency first */
+        f.tuner = 0;
         f.frequency = tmp->frequency ? tmp->frequency : DEFAULT_FREQUENCY;
         f.frequency = si4713_to_v4l2(f.frequency);
         rval |= si4713_s_frequency(&sdev->sd, &f);
@@ -1852,7 +1853,8 @@ static int si4713_g_frequency(struct v4l2_subdev *sd, struct v4l2_frequency *f)
         struct si4713_device *sdev = to_si4713_device(sd);
         int rval = 0;
 
-        f->type = V4L2_TUNER_RADIO;
+        if (f->tuner)
+                return -EINVAL;
 
         if (sdev->power_state) {
                 u16 freq;
@@ -1877,9 +1879,11 @@ static int si4713_s_frequency(struct v4l2_subdev *sd, const struct v4l2_frequenc
         int rval = 0;
         u16 frequency = v4l2_to_si4713(f->frequency);
 
+        if (f->tuner)
+                return -EINVAL;
+
         /* Check frequency range */
-        if (frequency < FREQ_RANGE_LOW || frequency > FREQ_RANGE_HIGH)
-                return -EDOM;
+        frequency = clamp_t(u16, frequency, FREQ_RANGE_LOW, FREQ_RANGE_HIGH);
 
         if (sdev->power_state) {
                 rval = si4713_tx_tune_freq(sdev, frequency);