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[media] bttv: disable g/s_tuner and g/s_freq when no tuner present, fix return codes 

If no tuner is present, then disable the tuner and frequency ioctls.
We can remove a number of checks from those ioctls testing for the presence
of a tuner.
Also remove some tuner type checks (now done by the core) and fix an
error return when the prio check fails.
Finally some 'unlikely' statements are removed since those only make sense
in tightly often executed loops, otherwise they just clutter up the code.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Hans Verkuil 2013-02-06 11:43:07 -03:00 committed by Mauro Carvalho Chehab
parent f74f89cb1c
commit d9b6707673
1 changed files with 16 additions and 28 deletions
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44
drivers/media/pci/bt8xx/bttv-driver.c
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@ -1984,25 +1984,17 @@ static int bttv_s_tuner(struct file *file, void *priv,
struct bttv *btv = fh->btv;
int err;
if (unlikely(0 != t->index))
if (t->index)
return -EINVAL;
if (unlikely(btv->tuner_type == TUNER_ABSENT)) {
err = -EINVAL;
goto err;
}
err = v4l2_prio_check(&btv->prio, fh->prio);
if (unlikely(err))
goto err;
if (err)
return err;
bttv_call_all(btv, tuner, s_tuner, t);
if (btv->audio_mode_gpio)
btv->audio_mode_gpio(btv, t, 1);
err:
return 0;
}
@ -2012,9 +2004,10 @@ static int bttv_g_frequency(struct file *file, void *priv,
struct bttv_fh *fh = priv;
struct bttv *btv = fh->btv;
f->type = btv->radio_user ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
f->frequency = btv->freq;
if (f->tuner)
return -EINVAL;
f->frequency = btv->freq;
return 0;
}
@ -2025,24 +2018,17 @@ static int bttv_s_frequency(struct file *file, void *priv,
struct bttv *btv = fh->btv;
int err;
if (unlikely(f->tuner != 0))
if (f->tuner)
return -EINVAL;
err = v4l2_prio_check(&btv->prio, fh->prio);
if (unlikely(err))
goto err;
if (err)
return err;
if (unlikely(f->type != (btv->radio_user
? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV))) {
err = -EINVAL;
goto err;
}
btv->freq = f->frequency;
bttv_call_all(btv, tuner, s_frequency, f);
if (btv->has_matchbox && btv->radio_user)
tea5757_set_freq(btv, btv->freq);
err:
return 0;
}
@ -2983,8 +2969,6 @@ static int bttv_g_tuner(struct file *file, void *priv,
struct bttv_fh *fh = priv;
struct bttv *btv = fh->btv;
if (btv->tuner_type == TUNER_ABSENT)
return -EINVAL;
if (0 != t->index)
return -EINVAL;
@ -3486,8 +3470,6 @@ static int radio_g_tuner(struct file *file, void *priv, struct v4l2_tuner *t)
struct bttv_fh *fh = priv;
struct bttv *btv = fh->btv;
if (btv->tuner_type == TUNER_ABSENT)
return -EINVAL;
if (0 != t->index)
return -EINVAL;
strcpy(t->name, "Radio");
@ -4131,7 +4113,7 @@ static irqreturn_t bttv_irq(int irq, void *dev_id)
/* ----------------------------------------------------------------------- */
/* initialitation */
/* initialization */
static struct video_device *vdev_init(struct bttv *btv,
const struct video_device *template,
@ -4150,6 +4132,12 @@ static struct video_device *vdev_init(struct bttv *btv,
snprintf(vfd->name, sizeof(vfd->name), "BT%d%s %s (%s)",
btv->id, (btv->id==848 && btv->revision==0x12) ? "A" : "",
type_name, bttv_tvcards[btv->c.type].name);
if (btv->tuner_type == TUNER_ABSENT) {
v4l2_disable_ioctl(vfd, VIDIOC_G_FREQUENCY);
v4l2_disable_ioctl(vfd, VIDIOC_S_FREQUENCY);
v4l2_disable_ioctl(vfd, VIDIOC_G_TUNER);
v4l2_disable_ioctl(vfd, VIDIOC_S_TUNER);
}
return vfd;
}