Hi Hans,
Thank you for the patch.
On Saturday 15 March 2014 14:08:00 Hans Verkuil wrote:
> From: Hans Verkuil <hans.verk...@cisco.com>
>
> The notify function is a void function, yet the v4l2_subdev_notify
> define uses it in a ? : construction, which causes sparse warnings.
>
> Signed-off-by: Hans Verkuil <hans.verk...@cisco.com>
> ---
> include/media/v4l2-subdev.h | 8 +++++---
> 1 file changed, 5 insertions(+), 3 deletions(-)
>
> diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h
> index 28f4d8c..0fbf669 100644
> --- a/include/media/v4l2-subdev.h
> +++ b/include/media/v4l2-subdev.h
> @@ -692,9 +692,11 @@ void v4l2_subdev_init(struct v4l2_subdev *sd,
> (sd)->ops->o->f((sd) , ##args) : -ENOIOCTLCMD))
>
> /* Send a notification to v4l2_device. */
> -#define v4l2_subdev_notify(sd, notification, arg) \
> - ((!(sd) || !(sd)->v4l2_dev || !(sd)->v4l2_dev->notify) ? -ENODEV : \
> - (sd)->v4l2_dev->notify((sd), (notification), (arg)))
> +#define v4l2_subdev_notify(sd, notification, arg)
> \
> + do {
> \
> + if ((sd) && (sd)->v4l2_dev && (sd)->v4l2_dev->notify)
> \
> + (sd)->v4l2_dev->notify((sd), (notification), (arg));
> \
> + } while (0)
The construct would prevent using v4l2_subdev_notify() as an expression. What
about turning the macro into an inline function instead ?
> #define v4l2_subdev_has_op(sd, o, f) \
> ((sd)->ops->o && (sd)->ops->o->f)
--
Regards,
Laurent Pinchart
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