From 7078daa020db5ba501fa3de64b8653c221a640b4 Mon Sep 17 00:00:00 2001 From: Laurent Pinchart Date: Mon, 14 May 2012 04:34:34 -0300 Subject: [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 Signed-off-by: Laurent Pinchart Signed-off-by: Mauro Carvalho Chehab --- include/linux/uvcvideo.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'include/linux/uvcvideo.h') diff --git a/include/linux/uvcvideo.h b/include/linux/uvcvideo.h index f46a53f060d..3b081862b9e 100644 --- a/include/linux/uvcvideo.h +++ b/include/linux/uvcvideo.h @@ -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; }; -- cgit v1.2.3-70-g09d2