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[media] em28xx: remove obsolete device state checks from the ioctl functions 

v4l2_device_disconnect() is called when the device is disconnected, so that the
v4l2-core rejects all ioctl calls.

Signed-off-by: Frank Schäfer <fschaefer.oss@googlemail.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Frank Schaefer 2013-02-07 13:39:18 -03:00 committed by Mauro Carvalho Chehab
parent 7a92de6a4c
commit eb17cee275
1 changed files with 0 additions and 43 deletions
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43
drivers/media/usb/em28xx/em28xx-video.c
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@ -799,15 +799,6 @@ const struct v4l2_ctrl_ops em28xx_ctrl_ops = {
.s_ctrl = em28xx_s_ctrl,
};
static int check_dev(struct em28xx *dev)
{
if (dev->disconnected) {
em28xx_errdev("v4l2 ioctl: device not present\n");
return -ENODEV;
}
return 0;
}
static void get_scale(struct em28xx *dev,
unsigned int width, unsigned int height,
unsigned int *hscale, unsigned int *vscale)
@ -957,11 +948,6 @@ static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *norm)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
int rc;
rc = check_dev(dev);
if (rc < 0)
return rc;
*norm = dev->norm;
@ -972,11 +958,6 @@ static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *norm)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
int rc;
rc = check_dev(dev);
if (rc < 0)
return rc;
v4l2_device_call_all(&dev->v4l2_dev, 0, video, querystd, norm);
@ -988,13 +969,9 @@ static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id *norm)
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
struct v4l2_format f;
int rc;
if (*norm == dev->norm)
return 0;
rc = check_dev(dev);
if (rc < 0)
return rc;
if (dev->streaming_users > 0)
return -EBUSY;
@ -1101,11 +1078,6 @@ static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
int rc;
rc = check_dev(dev);
if (rc < 0)
return rc;
if (i >= MAX_EM28XX_INPUT)
return -EINVAL;
@ -1180,11 +1152,6 @@ static int vidioc_g_tuner(struct file *file, void *priv,
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
int rc;
rc = check_dev(dev);
if (rc < 0)
return rc;
if (0 != t->index)
return -EINVAL;
@ -1200,11 +1167,6 @@ static int vidioc_s_tuner(struct file *file, void *priv,
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
int rc;
rc = check_dev(dev);
if (rc < 0)
return rc;
if (0 != t->index)
return -EINVAL;
@ -1231,11 +1193,6 @@ static int vidioc_s_frequency(struct file *file, void *priv,
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
int rc;
rc = check_dev(dev);
if (rc < 0)
return rc;
if (0 != f->tuner)
return -EINVAL;