[REVIEW PATCH 01/12] em28xx: use v4l2_disable_ioctl() to disable ioctls VIDIOC_QUERYSTD, VIDIOC_G/S_STD

Frank Schäfer
2013-01-25T17:26:40Z

Instead of checking the device type and returning -ENOTTY inside the ioctl
functions, use v4l2_disable_ioctl() to disable the ioctls VIDIOC_QUERYSTD,
VIDIOC_G_STD and VIDIOC_S_STD if the device is a camera.

Signed-off-by: Frank Schäfer <fschaefer.oss@googlemail.com>
---
drivers/media/usb/em28xx/em28xx-video.c | 13 +++++++------
1 Datei geändert, 7 Zeilen hinzugefügt(+), 6 Zeilen entfernt(-)

diff --git a/drivers/media/usb/em28xx/em28xx-video.c b/drivers/media/usb/em28xx/em28xx-video.c
index 2eabf2a..7f1f37c 100644
--- a/drivers/media/usb/em28xx/em28xx-video.c
+++ b/drivers/media/usb/em28xx/em28xx-video.c
@@ -959,8 +959,6 @@ static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *norm)
struct em28xx *dev = fh->dev;
int rc;

- if (dev->board.is_webcam)
- return -ENOTTY;
rc = check_dev(dev);
if (rc < 0)
return rc;
@@ -976,8 +974,6 @@ static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *norm)
struct em28xx *dev = fh->dev;
int rc;

- if (dev->board.is_webcam)
- return -ENOTTY;
rc = check_dev(dev);
if (rc < 0)
return rc;
@@ -994,8 +990,6 @@ static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id *norm)
struct v4l2_format f;
int rc;

- if (dev->board.is_webcam)
- return -ENOTTY;
if (*norm == dev->norm)
return 0;
rc = check_dev(dev);
@@ -1899,6 +1893,13 @@ int em28xx_register_analog_devices(struct em28xx *dev)
dev->vdev->queue = &dev->vb_vidq;
dev->vdev->queue->lock = &dev->vb_queue_lock;

+ /* disable inapplicable ioctls */
+ if (dev->board.is_webcam) {
+ v4l2_disable_ioctl(dev->vdev, VIDIOC_QUERYSTD);
+ v4l2_disable_ioctl(dev->vdev, VIDIOC_G_STD);
+ v4l2_disable_ioctl(dev->vdev, VIDIOC_S_STD);
+ }
+
/* register v4l2 video video_device */
ret = video_register_device(dev->vdev, VFL_TYPE_GRABBER,
video_nr[dev->devno]);
--
1.7.10.4