staging: vboxvideo: Pass a new framebuffer to vbox_crtc_do_set_base

This modifies vbox_crtc_do_set_base() to take a new framebuffer to
be activated, instead of the existing framebuffer attached to the crtc.
This change allows the function to be given the new framebuffer from
a page-flip request.
Signed-off-by: Steve Longerbeam <steve_longerbeam@mentor.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/vboxvideo/vbox_mode.c

@@ -222,7 +222,9 @@ static bool vbox_set_up_input_mapping(struct vbox_private *vbox)
 }
 
 static int vbox_crtc_do_set_base(struct drm_crtc *crtc,
-				 struct drm_framebuffer *old_fb, int x, int y)
+				 struct drm_framebuffer *old_fb,
+				 struct drm_framebuffer *new_fb,
+				 int x, int y)
 {
 	struct vbox_private *vbox = crtc->dev->dev_private;
 	struct vbox_crtc *vbox_crtc = to_vbox_crtc(crtc);
@@ -245,7 +247,7 @@ static int vbox_crtc_do_set_base(struct drm_crtc *crtc,
 		vbox_bo_unreserve(bo);
 	}
 
-	vbox_fb = to_vbox_framebuffer(CRTC_FB(crtc));
+	vbox_fb = to_vbox_framebuffer(new_fb);
 	obj = vbox_fb->obj;
 	bo = gem_to_vbox_bo(obj);
 
@@ -281,7 +283,7 @@ static int vbox_crtc_do_set_base(struct drm_crtc *crtc,
 static int vbox_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
 				   struct drm_framebuffer *old_fb)
 {
-	return vbox_crtc_do_set_base(crtc, old_fb, x, y);
+	return vbox_crtc_do_set_base(crtc, old_fb, CRTC_FB(crtc), x, y);
 }
 
 static int vbox_crtc_mode_set(struct drm_crtc *crtc,