Instead of checking the device type and returning -EINVAL inside the ioctl
functions, use v4l2_disable_ioctl() to disable the ioctls VIDIOC_G_AUDIO and
VIDIOC_S_AUDIO if the device doesn't support audio.
Signed-off-by: Frank Schäfer <fschaefer.oss@xxxxxxxxxxxxxx>
---
drivers/media/usb/em28xx/em28xx-video.c | 15 ++++++++-------
1 Datei geändert, 8 Zeilen hinzugefügt(+), 7 Zeilen entfernt(-)
diff --git a/drivers/media/usb/em28xx/em28xx-video.c b/drivers/media/usb/em28xx/em28xx-video.c
index dd2e31c..378d8a1 100644
--- a/drivers/media/usb/em28xx/em28xx-video.c
+++ b/drivers/media/usb/em28xx/em28xx-video.c
@@ -1130,9 +1130,6 @@ static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
- if (!dev->audio_mode.has_audio)
- return -EINVAL;
-
switch (a->index) {
case EM28XX_AMUX_VIDEO:
strcpy(a->name, "Television");
@@ -1173,10 +1170,6 @@ static int vidioc_s_audio(struct file *file, void *priv, const struct v4l2_audio
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
-
- if (!dev->audio_mode.has_audio)
- return -EINVAL;
-
if (a->index >= MAX_EM28XX_INPUT)
return -EINVAL;
if (0 == INPUT(a->index)->type)
@@ -1905,6 +1898,10 @@ int em28xx_register_analog_devices(struct em28xx *dev)
v4l2_disable_ioctl(dev->vdev, VIDIOC_G_FREQUENCY);
v4l2_disable_ioctl(dev->vdev, VIDIOC_S_FREQUENCY);
}
+ if (!dev->audio_mode.has_audio) {
+ v4l2_disable_ioctl(dev->vdev, VIDIOC_G_AUDIO);
+ v4l2_disable_ioctl(dev->vdev, VIDIOC_S_AUDIO);
+ }
/* register v4l2 video video_device */
ret = video_register_device(dev->vdev, VFL_TYPE_GRABBER,
@@ -1930,6 +1927,10 @@ int em28xx_register_analog_devices(struct em28xx *dev)
v4l2_disable_ioctl(dev->vbi_dev, VIDIOC_G_FREQUENCY);
v4l2_disable_ioctl(dev->vbi_dev, VIDIOC_S_FREQUENCY);
}
+ if (!dev->audio_mode.has_audio) {
+ v4l2_disable_ioctl(dev->vbi_dev, VIDIOC_G_AUDIO);
+ v4l2_disable_ioctl(dev->vbi_dev, VIDIOC_S_AUDIO);
+ }
/* register v4l2 vbi video_device */
ret = video_register_device(dev->vbi_dev, VFL_TYPE_VBI,
--
1.7.10.4
--
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