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| author | Hans Verkuil <hverkuil@xs4all.nl> | 2014-12-07 11:59:42 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@osg.samsung.com> | 2014-12-16 23:21:39 -0200 |
| commit | 454a4e728dd56c8515b80381c14168099279e7fc (patch) | |
| tree | 45f99d5b5726ed8f68b3e4554255714ff8e3abac /drivers | |
| parent | bb9ff078860f9d2f79d3a6bea3af9f48354ddb75 (diff) | |
| download | lwn-454a4e728dd56c8515b80381c14168099279e7fc.tar.gz lwn-454a4e728dd56c8515b80381c14168099279e7fc.zip | |
[media] v4l2-ioctl: WARN_ON if querycap didn't fill device_caps
This is easy to forget to do in drivers. While v4l2-compliance will check for it,
not everyone remembers to run it. So warn about it.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/media/v4l2-core/v4l2-ioctl.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c index 75658717961f..faac2f4e0f3a 100644 --- a/drivers/media/v4l2-core/v4l2-ioctl.c +++ b/drivers/media/v4l2-core/v4l2-ioctl.c @@ -1017,6 +1017,12 @@ static int v4l_querycap(const struct v4l2_ioctl_ops *ops, ret = ops->vidioc_querycap(file, fh, cap); cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT; + /* + * Drivers MUST fill in device_caps, so check for this and + * warn if it was forgotten. + */ + WARN_ON(!(cap->capabilities & V4L2_CAP_DEVICE_CAPS) || + !cap->device_caps); cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT; return ret; |