[media] v4l2-core: drop g/s_priority ops

The handling of VIDIOC_G/S_PRIORITY is now entirely done by the V4L2
core, so we can drop the g/s_priority ioctl ops.

We do have to make sure though that when S_PRIORITY is called we check
that the driver used struct v4l2_fh. This check can be removed once all
drivers are converted to that structure.

Signed-off-by: Hans Verkuil <[e-mail]>
Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

drivers/media/v4l2-core/v4l2-dev.c

···
 	/* vfl_type and vfl_dir independent ioctls */
 
 	SET_VALID_IOCTL(ops, VIDIOC_QUERYCAP, vidioc_querycap);
-	if (ops->vidioc_g_priority)
-		set_bit(_IOC_NR(VIDIOC_G_PRIORITY), valid_ioctls);
-	if (ops->vidioc_s_priority)
-		set_bit(_IOC_NR(VIDIOC_S_PRIORITY), valid_ioctls);
+	set_bit(_IOC_NR(VIDIOC_G_PRIORITY), valid_ioctls);
+	set_bit(_IOC_NR(VIDIOC_S_PRIORITY), valid_ioctls);
+
 	/* Note: the control handler can also be passed through the filehandle,
 	   and that can't be tested here. If the bit for these control ioctls
 	   is set, then the ioctl is valid. But if it is 0, then it can still

drivers/media/v4l2-core/v4l2-ioctl.c

···
 	struct video_device *vfd;
 	u32 *p = arg;
 
-	if (ops->vidioc_g_priority)
-		return ops->vidioc_g_priority(file, fh, arg);
 	vfd = video_devdata(file);
 	*p = v4l2_prio_max(vfd->prio);
 	return 0;
···
 	struct v4l2_fh *vfh;
 	u32 *p = arg;
 
-	if (ops->vidioc_s_priority)
-		return ops->vidioc_s_priority(file, fh, *p);
 	vfd = video_devdata(file);
+	if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
+		return -ENOTTY;
 	vfh = file->private_data;
 	return v4l2_prio_change(vfd->prio, &vfh->prio, *p);
 }

include/media/v4l2-ioctl.h

···
 	/* VIDIOC_QUERYCAP handler */
 	int (*vidioc_querycap)(struct file *file, void *fh, struct v4l2_capability *cap);
 
-	/* Priority handling */
-	int (*vidioc_g_priority)   (struct file *file, void *fh,
-				    enum v4l2_priority *p);
-	int (*vidioc_s_priority)   (struct file *file, void *fh,
-				    enum v4l2_priority p);
-
 	/* VIDIOC_ENUM_FMT handlers */
 	int (*vidioc_enum_fmt_vid_cap)     (struct file *file, void *fh,
 					    struct v4l2_fmtdesc *f);