V4L/DVB (13547): radio: add trivial checks on the tuner and type args.

Many radio drivers did not check the tuner and type field correctly
for g/s_frequency. These checks have now been added.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/media/radio/radio-tea5764.c b/drivers/media/radio/radio-tea5764.c
index 3cd76dddb6aa..730ffd9cdd3e 100644
--- a/drivers/media/radio/radio-tea5764.c
+++ b/drivers/media/radio/radio-tea5764.c
@@ -349,7 +349,7 @@ static int vidioc_s_frequency(struct file *file, void *priv,
 {
         struct tea5764_device *radio = video_drvdata(file);
 
-        if (f->tuner != 0)
+        if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
                 return -EINVAL;
         if (f->frequency == 0) {
                 /* We special case this as a power down control. */
@@ -370,6 +370,8 @@ static int vidioc_g_frequency(struct file *file, void *priv,
         struct tea5764_device *radio = video_drvdata(file);
         struct tea5764_regs *r = &radio->regs;
 
+        if (f->tuner != 0)
+                return -EINVAL;
         tea5764_i2c_read(radio);
         memset(f, 0, sizeof(f));
         f->type = V4L2_TUNER_RADIO;