[media] saa7164: add v4l2_fh support

Control events require the use of struct v4l2_fh. Add this to saa7164.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

drivers/media/pci/saa7164/saa7164-encoder.c

@@ -746,8 +746,10 @@ static int fops_open(struct file *file)
 	if (NULL == fh)
 		return -ENOMEM;
 
-	file->private_data = fh;
 	fh->port = port;
+	v4l2_fh_init(&fh->fh, video_devdata(file));
+	v4l2_fh_add(&fh->fh);
+	file->private_data = fh;
 
 	return 0;
 }
@@ -768,7 +770,8 @@ static int fops_release(struct file *file)
 		}
 	}
 
-	file->private_data = NULL;
+	v4l2_fh_del(&fh->fh);
+	v4l2_fh_exit(&fh->fh);
 	kfree(fh);
 
 	return 0;

drivers/media/pci/saa7164/saa7164-vbi.c

@@ -678,8 +678,10 @@ static int fops_open(struct file *file)
 	if (NULL == fh)
 		return -ENOMEM;
 
-	file->private_data = fh;
 	fh->port = port;
+	v4l2_fh_init(&fh->fh, video_devdata(file));
+	v4l2_fh_add(&fh->fh);
+	file->private_data = fh;
 
 	return 0;
 }
@@ -700,7 +702,8 @@ static int fops_release(struct file *file)
 		}
 	}
 
-	file->private_data = NULL;
+	v4l2_fh_del(&fh->fh);
+	v4l2_fh_exit(&fh->fh);
 	kfree(fh);
 
 	return 0;

drivers/media/pci/saa7164/saa7164.h

@@ -186,11 +186,13 @@ struct saa7164_subid {
 };
 
 struct saa7164_encoder_fh {
+	struct v4l2_fh fh;
 	struct saa7164_port *port;
 	atomic_t v4l_reading;
 };
 
 struct saa7164_vbi_fh {
+	struct v4l2_fh fh;
 	struct saa7164_port *port;
 	atomic_t v4l_reading;
 };