Commit 7078daa0 authored May 14, 2012 by Laurent Pinchart Committed by Mauro Carvalho Chehab Jul 06, 2012

[media] uvcvideo: Document the struct uvc_xu_control_query query field



Several developers have reported that the lack of macros for the struct
uvc_xu_control_query query field in uvcvideo.h was confusing and forced
them to look at the driver source code to find out what applications
were supposed to pass in that field.

Add a comment to the header to clarify the expected usage of the query
field.

Reported-by: Paulo Assis <pj.assis@gmail.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

parent 257ee97e

include/linux/uvcvideo.h

+2 −1

Original line number	Diff line number	Diff line
		@@ -58,7 +58,8 @@ struct uvc_xu_control_mapping {
		struct uvc_xu_control_query {
		__u8 unit;
		__u8 selector;
		__u8 query;
		__u8 query; /* Video Class-Specific Request Code, */
		/* defined in linux/usb/video.h A.8. */
		__u16 size;
		__u8 __user *data;
		};

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