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[media] radio-sf16fmi: clamp frequency 

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Cc: Ondrej Zary <linux@rainbow-software.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Hans Verkuil 2013-05-31 06:21:03 -03:00 committed by Mauro Carvalho Chehab
parent f90842d62b
commit 96bb42b8ab
1 changed files with 5 additions and 6 deletions
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11
drivers/media/radio/radio-sf16fmi.c
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@ -55,8 +55,8 @@ static struct fmi fmi_card;
static struct pnp_dev *dev;
bool pnp_attached;
#define RSF16_MINFREQ (87 * 16000)
#define RSF16_MAXFREQ (108 * 16000)
#define RSF16_MINFREQ (87U * 16000)
#define RSF16_MAXFREQ (108U * 16000)
#define FMI_BIT_TUN_CE (1 << 0)
#define FMI_BIT_TUN_CLK (1 << 1)
@ -155,15 +155,14 @@ static int vidioc_s_frequency(struct file *file, void *priv,
const struct v4l2_frequency *f)
{
struct fmi *fmi = video_drvdata(file);
unsigned freq = f->frequency;
if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
return -EINVAL;
if (f->frequency < RSF16_MINFREQ ||
f->frequency > RSF16_MAXFREQ)
return -EINVAL;
clamp(freq, RSF16_MINFREQ, RSF16_MAXFREQ);
/* rounding in steps of 800 to match the freq
that will be used */
lm7000_set_freq((f->frequency / 800) * 800, fmi, fmi_set_pins);
lm7000_set_freq((freq / 800) * 800, fmi, fmi_set_pins);
return 0;
}