On Fri, Dec 15, 2017 at 01:32:21PM +0900, Tomasz Figa wrote: > Currently v4l2_device_register_subdev_nodes() does not initialize the > dev_parent field of the video_device structs it creates for subdevices > being registered. This leads to __video_register_device() falling back > to the parent device of associated v4l2_device struct, which often does > not match the physical device the subdevice is registered for. > > Due to the problem above, the links between real devices and v4l-subdev > nodes cannot be obtained from sysfs, which might be confusing for the > userspace trying to identify the hardware. > > Fix this by initializing the dev_parent field of the video_device struct > with the value of dev field of the v4l2_subdev struct. In case of > subdevices without a parent struct device, the field will be NULL and the > old behavior will be preserved by the semantics of > __video_register_device(). > > Signed-off-by: Tomasz Figa <tfiga@xxxxxxxxxxxx> Acked-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx> -- Sakari Ailus sakari.ailus@xxxxxxxxxxxxxxx
