[media] v4l2-subdev: implement per-filehandle control handlers

To be consistent with v4l2-ioctl.c.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/v4l2-device.c

@@ -209,6 +209,7 @@ int v4l2_device_register_subdev_nodes(struct v4l2_device *v4l2_dev)
 		vdev->v4l2_dev = v4l2_dev;
 		vdev->fops = &v4l2_subdev_fops;
 		vdev->release = video_device_release_empty;
+		vdev->ctrl_handler = sd->ctrl_handler;
 		err = __video_register_device(vdev, VFL_TYPE_SUBDEV, -1, 1,
 					      sd->owner);
 		if (err < 0)

drivers/media/video/v4l2-subdev.c

@@ -155,25 +155,25 @@ static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg)
 
 	switch (cmd) {
 	case VIDIOC_QUERYCTRL:
-		return v4l2_queryctrl(sd->ctrl_handler, arg);
+		return v4l2_queryctrl(vfh->ctrl_handler, arg);
 
 	case VIDIOC_QUERYMENU:
-		return v4l2_querymenu(sd->ctrl_handler, arg);
+		return v4l2_querymenu(vfh->ctrl_handler, arg);
 
 	case VIDIOC_G_CTRL:
-		return v4l2_g_ctrl(sd->ctrl_handler, arg);
+		return v4l2_g_ctrl(vfh->ctrl_handler, arg);
 
 	case VIDIOC_S_CTRL:
-		return v4l2_s_ctrl(sd->ctrl_handler, arg);
+		return v4l2_s_ctrl(vfh->ctrl_handler, arg);
 
 	case VIDIOC_G_EXT_CTRLS:
-		return v4l2_g_ext_ctrls(sd->ctrl_handler, arg);
+		return v4l2_g_ext_ctrls(vfh->ctrl_handler, arg);
 
 	case VIDIOC_S_EXT_CTRLS:
-		return v4l2_s_ext_ctrls(sd->ctrl_handler, arg);
+		return v4l2_s_ext_ctrls(vfh->ctrl_handler, arg);
 
 	case VIDIOC_TRY_EXT_CTRLS:
-		return v4l2_try_ext_ctrls(sd->ctrl_handler, arg);
+		return v4l2_try_ext_ctrls(vfh->ctrl_handler, arg);
 
 	case VIDIOC_DQEVENT:
 		if (!(sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS))