> Mauro Carvalho Chehab wrote:
>>>> Video device drivers should use the v4l2_fh pointer as their
>>>> file->private_data.
>
> ...
>
>>> The struct v4l2_fh is meant to be a part of the driver's own file
>>> handle
>>> structure. It does not attempt to offer drivers anything directly but
>>> generic functionality that depends on file handle specific data such as
>>> V4L2 events. E.g.
>>>
>>> struct my_video_fh {
>>> blah;
>>> struct v4l2_fh fh;
>>> blah;
>>> };
>
> An additional comment about this:
>
> On your comment, you said that "Video device drivers should use the
> v4l2_fh
> pointer as their file->private_data.".
> This can be understood as:
> file->private_data = v4l2_fh;
>
> But a driver following your example, should do, instead:
> file->private_data = my_video_fh;
No, it should do:
file->private_data = &my_video_fh.fh;
Then later you can use to_container to get back to my_video_fh.
But it is true that a short example might clarify things.
Regards,
Hans
>
> Please, be sure that you document it clearly when you submit it again.
>
> --
>
> Cheers,
> Mauro
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--
Hans Verkuil - video4linux developer - sponsored by TANDBERG Telecom
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