[065/145] V4L/DVB (13148): uvcvideo: Handle V4L2_CTRL_TYPE_BUTTON control type in VIDIOC_QUERYCTRL

[Greg KH]

2.6.32-stable review patch.  If anyone has any objections, please let me know.

----------------
From: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>

commit f4eabafeb3ea41801260fba624cbf2da971d19f8 upstream.

Return minimum, maximum and step set to 0 without querying the hardware.

Signed-off-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxx>
Cc: maximilian attems <max@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

---
 drivers/media/video/uvc/uvc_ctrl.c |    7 +++++++
 1 file changed, 7 insertions(+)

--- a/drivers/media/video/uvc/uvc_ctrl.c
+++ b/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;
 	}


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