V4L/DVB: usbvision: don't use usb_set_intfdata, let v4l2_device_register handle this

v4l2_device_register already sets intfdata, no need to do this again.
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/usbvision/usbvision-video.c

@@ -1649,8 +1649,6 @@ static int __devinit usbvision_probe(struct usb_interface *intf,
 	usbvision_configure_video(usbvision);
 	mutex_unlock(&usbvision->lock);
 
-
-	usb_set_intfdata (intf, usbvision);
 	usbvision_create_sysfs(usbvision->vdev);
 
 	PDEBUG(DBG_PROBE, "success");
@@ -1668,7 +1666,7 @@ static int __devinit usbvision_probe(struct usb_interface *intf,
  */
 static void __devexit usbvision_disconnect(struct usb_interface *intf)
 {
-	struct usb_usbvision *usbvision = usb_get_intfdata(intf);
+	struct usb_usbvision *usbvision = to_usbvision(usb_get_intfdata(intf));
 
 	PDEBUG(DBG_PROBE, "");
 
@@ -1677,7 +1675,6 @@ static void __devexit usbvision_disconnect(struct usb_interface *intf)
 			"%s: usb_get_intfdata() failed\n", __func__);
 		return;
 	}
-	usb_set_intfdata (intf, NULL);
 
 	mutex_lock(&usbvision->lock);
 

drivers/media/video/usbvision/usbvision.h

@@ -462,6 +462,11 @@ struct usb_usbvision {
 	int ComprBlockTypes[4];
 };
 
+static inline struct usb_usbvision *to_usbvision(struct v4l2_device *v4l2_dev)
+{
+	return container_of(v4l2_dev, struct usb_usbvision, v4l2_dev);
+}
+
 #define call_all(usbvision, o, f, args...) \
 	v4l2_device_call_all(&usbvision->v4l2_dev, 0, o, f, ##args)