--- drivers/media/video/uvc/uvc_ctrl.c

+++ drivers/media/video/uvc/uvc_ctrl.c

@@ -826,6 +826,13 @@ int uvc_query_v4l2_ctrl(struct uvc_video

ret = 0;

goto out;

+ case V4L2_CTRL_TYPE_BUTTON:

+ v4l2_ctrl->minimum = 0;

+ v4l2_ctrl->maximum = 0;

+ v4l2_ctrl->step = 0;

+ ret = 0;

+ goto out;

+

default:

break;

}