/home/v4l/master/v4l/v4l2-device.c:32:2: warning: Using plain integer as NULL pointer
/home/v4l/master/v4l/v4l2-device.c:64:2: warning: Using plain integer as NULL pointer
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
        if (dev == NULL || v4l2_dev == NULL)
                return -EINVAL;
        /* Warn if we apparently re-register a device */
-       WARN_ON(dev_get_drvdata(dev));
+       WARN_ON(dev_get_drvdata(dev) != NULL);
        INIT_LIST_HEAD(&v4l2_dev->subdevs);
        spin_lock_init(&v4l2_dev->lock);
        v4l2_dev->dev = dev;
        if (dev == NULL || sd == NULL || !sd->name[0])
                return -EINVAL;
        /* Warn if we apparently re-register a subdev */
-       WARN_ON(sd->dev);
+       WARN_ON(sd->dev != NULL);
        if (!try_module_get(sd->owner))
                return -ENODEV;
        sd->dev = dev;