[media] uvcvideo: Move fields from uvc_buffer::buf to uvc_buffer

Add mem, length and bytesused fields to the uvc_buffer structure and use
them instead of accessing the uvc_buffer::buf m.offset, length and
bytesused fields directly. This prepares the driver to the conversion to
videobuf2.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/media/video/uvc/uvcvideo.h b/drivers/media/video/uvc/uvcvideo.h
index 4c1392ebcd4b..55f917105b57 100644
--- a/drivers/media/video/uvc/uvcvideo.h
+++ b/drivers/media/video/uvc/uvcvideo.h
@@ -328,6 +328,10 @@ struct uvc_buffer {
         wait_queue_head_t wait;
         enum uvc_buffer_state state;
         unsigned int error;
+
+        void *mem;
+        unsigned int length;
+        unsigned int bytesused;
 };
 
 #define UVC_QUEUE_STREAMING             (1 << 0)