[media] saa7134: v4l2-compliance: return real frequency

Make saa7134 driver more V4L2 compliant: don't cache frequency in
s_frequency/g_frequency but return real one instead
Signed-off-by: Ondrej Zary <linux@rainbow-software.org>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/pci/saa7134/saa7134-video.c

@@ -2051,8 +2051,11 @@ static int saa7134_g_frequency(struct file *file, void *priv,
 	struct saa7134_fh *fh = priv;
 	struct saa7134_dev *dev = fh->dev;
 
+	if (0 != f->tuner)
+		return -EINVAL;
+
 	f->type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
-	f->frequency = dev->ctl_freq;
+	saa_call_all(dev, tuner, g_frequency, f);
 
 	return 0;
 }
@@ -2070,7 +2073,6 @@ static int saa7134_s_frequency(struct file *file, void *priv,
 	if (1 == fh->radio && V4L2_TUNER_RADIO != f->type)
 		return -EINVAL;
 	mutex_lock(&dev->lock);
-	dev->ctl_freq = f->frequency;
 
 	saa_call_all(dev, tuner, s_frequency, f);
 

drivers/media/pci/saa7134/saa7134.h

@@ -607,7 +607,6 @@ struct saa7134_dev {
 	int                        ctl_contrast;
 	int                        ctl_hue;
 	int                        ctl_saturation;
-	int                        ctl_freq;
 	int                        ctl_mute;             /* audio */
 	int                        ctl_volume;
 	int                        ctl_invert;           /* private */