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, 4 insertions, 0 deletions

diff --git a/drivers/media/radio/radio-gemtek-pci.c b/drivers/media/radio/radio-gemtek-pci.c
index c6cf11661868..000f4d34087c 100644
--- a/drivers/media/radio/radio-gemtek-pci.c
+++ b/drivers/media/radio/radio-gemtek-pci.c
@@ -240,6 +240,8 @@ static int vidioc_s_frequency(struct file *file, void *priv,
 {
         struct gemtek_pci *card = video_drvdata(file);
 
+        if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
+                return -EINVAL;
         if (f->frequency < GEMTEK_PCI_RANGE_LOW ||
             f->frequency > GEMTEK_PCI_RANGE_HIGH)
                 return -EINVAL;
@@ -253,6 +255,8 @@ static int vidioc_g_frequency(struct file *file, void *priv,
 {
         struct gemtek_pci *card = video_drvdata(file);
 
+        if (f->tuner != 0)
+                return -EINVAL;
         f->type = V4L2_TUNER_RADIO;
         f->frequency = card->current_frequency;
         return 0;