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V4L/DVB (10815): bttv: Don't need to zero ioctl parameter fields

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The v4l2 core code in v4l2_ioctl will zero out the structure the driver is
supposed to fill in for read-only ioctls.  For read/write ioctls, all the
fields which aren't supplied from userspace will be zeroed out.

Zeroing code is removed from enum_input and g_tuner.

Signed-off-by: Trent Piepho <xyzzy@speakeasy.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Trent Piepho 2009-03-04 01:21:03 -03:00 committed by Mauro Carvalho Chehab
parent 717167e8ae
commit 522a5f1430
1 changed files with 2 additions and 9 deletions
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11
drivers/media/video/bt8xx/bttv-driver.c
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@ -1894,16 +1894,11 @@ static int bttv_enum_input(struct file *file, void *priv,
{
struct bttv_fh *fh = priv;
struct bttv *btv = fh->btv;
unsigned int n;
int n;
n = i->index;
if (n >= bttv_tvcards[btv->c.type].video_inputs)
if (i->index >= bttv_tvcards[btv->c.type].video_inputs)
return -EINVAL;
memset(i, 0, sizeof(*i));
i->index = n;
i->type = V4L2_INPUT_TYPE_CAMERA;
i->audioset = 1;
@ -2952,7 +2947,6 @@ static int bttv_g_tuner(struct file *file, void *priv,
return -EINVAL;
mutex_lock(&btv->lock);
memset(t, 0, sizeof(*t));
t->rxsubchans = V4L2_TUNER_SUB_MONO;
bttv_call_i2c_clients(btv, VIDIOC_G_TUNER, t);
strcpy(t->name, "Television");
@ -3495,7 +3489,6 @@ static int radio_g_tuner(struct file *file, void *priv, struct v4l2_tuner *t)
if (0 != t->index)
return -EINVAL;
mutex_lock(&btv->lock);
memset(t, 0, sizeof(*t));
strcpy(t->name, "Radio");
t->type = V4L2_TUNER_RADIO;