From: Hans Verkuil <hans.verkuil@xxxxxxxxx>
Clamp the frequency to the valid frequency range as per the V4L2 specification.
Signed-off-by: Hans Verkuil <hans.verkuil@xxxxxxxxx>
Cc: Richard Röjfors <richard.rojfors@xxxxxxxxxxxxxx>
---
drivers/media/radio/tef6862.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/drivers/media/radio/tef6862.c b/drivers/media/radio/tef6862.c
index 82c6c94..de2e6db 100644
--- a/drivers/media/radio/tef6862.c
+++ b/drivers/media/radio/tef6862.c
@@ -31,8 +31,8 @@
#define FREQ_MUL 16000
-#define TEF6862_LO_FREQ (875 * FREQ_MUL / 10)
-#define TEF6862_HI_FREQ (108 * FREQ_MUL)
+#define TEF6862_LO_FREQ (875U * FREQ_MUL / 10)
+#define TEF6862_HI_FREQ (108U * FREQ_MUL)
/* Write mode sub addresses */
#define WM_SUB_BANDWIDTH 0x0
@@ -105,6 +105,7 @@ static int tef6862_s_frequency(struct v4l2_subdev *sd, const struct v4l2_frequen
{
struct tef6862_state *state = to_state(sd);
struct i2c_client *client = v4l2_get_subdevdata(sd);
+ unsigned freq = f->frequency;
u16 pll;
u8 i2cmsg[3];
int err;
@@ -112,7 +113,8 @@ static int tef6862_s_frequency(struct v4l2_subdev *sd, const struct v4l2_frequen
if (f->tuner != 0)
return -EINVAL;
- pll = 1964 + ((f->frequency - TEF6862_LO_FREQ) * 20) / FREQ_MUL;
+ clamp(freq, TEF6862_LO_FREQ, TEF6862_HI_FREQ);
+ pll = 1964 + ((freq - TEF6862_LO_FREQ) * 20) / FREQ_MUL;
i2cmsg[0] = (MODE_PRESET << MODE_SHIFT) | WM_SUB_PLLM;
i2cmsg[1] = (pll >> 8) & 0xff;
i2cmsg[2] = pll & 0xff;
@@ -121,7 +123,7 @@ static int tef6862_s_frequency(struct v4l2_subdev *sd, const struct v4l2_frequen
if (err != sizeof(i2cmsg))
return err < 0 ? err : -EIO;
- state->freq = f->frequency;
+ state->freq = freq;
return 0;
}
--
1.7.10.4
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