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| author | Mauro Carvalho Chehab <mchehab@redhat.com> | 2009-08-04 19:52:37 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2009-08-04 19:52:37 -0300 |
| commit | 33a9a00f41338f5ab7589a2611da979c87b884ce (patch) | |
| tree | 665f8712c699a4cda9548288d0ebb630f0d35720 | |
| parent | 0a6ce90779f4a12f8e75009d19209a4ee48707d8 (diff) | |
| download | mediapointer-dvb-s2-33a9a00f41338f5ab7589a2611da979c87b884ce.tar.gz mediapointer-dvb-s2-33a9a00f41338f5ab7589a2611da979c87b884ce.tar.bz2 | |
em28xx: fix V4L2 API compliance: don't expose audio inputs for devices without it
From: Mauro Carvalho Chehab <mchehab@redhat.com>
V4L2 API (chapter 1.5) states that:
Drivers must implement all input ioctls when the device has one
or more inputs, all output ioctls when the device has one or more outputs.
When the device has any audio inputs or outputs the driver must set the
V4L2_CAP_AUDIO flag in the struct v4l2_capability returned by the
VIDIOC_QUERYCAP ioctl.
So, devices without audio input should return -EINVAL.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| -rw-r--r-- | linux/drivers/media/video/em28xx/em28xx-video.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/linux/drivers/media/video/em28xx/em28xx-video.c b/linux/drivers/media/video/em28xx/em28xx-video.c index fcb99fb71..258cd38ce 100644 --- a/linux/drivers/media/video/em28xx/em28xx-video.c +++ b/linux/drivers/media/video/em28xx/em28xx-video.c @@ -976,6 +976,9 @@ 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"); @@ -1022,6 +1025,9 @@ static int vidioc_s_audio(struct file *file, void *priv, struct v4l2_audio *a) return -EINVAL; #else + if (!dev->audio_mode.has_audio) + return -EINVAL; + if (a->index >= MAX_EM28XX_INPUT) return -EINVAL; if (0 == INPUT(a->index)->type) @@ -1444,9 +1450,11 @@ static int vidioc_querycap(struct file *file, void *priv, #endif V4L2_CAP_SLICED_VBI_CAPTURE | V4L2_CAP_VIDEO_CAPTURE | - V4L2_CAP_AUDIO | V4L2_CAP_READWRITE | V4L2_CAP_STREAMING; + if (dev->audio_mode.has_audio) + cap->capabilities |= V4L2_CAP_AUDIO; + if (dev->tuner_type != TUNER_ABSENT) cap->capabilities |= V4L2_CAP_TUNER; |