From 0d060d9933a7c42457eaaffe5e8430c8a1694b98 Mon Sep 17 00:00:00 2001
From: Chia-I Wu <olv@lunarg.com>
Date: Wed, 17 Nov 2010 23:35:02 +0800
Subject: [PATCH] st/vega: Do not wait NULL fences. (cherry picked from commit
 cc5c908d7deab59f3512e1a5762fd058c4ae5940)

---
 src/gallium/state_trackers/vega/api_context.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/src/gallium/state_trackers/vega/api_context.c b/src/gallium/state_trackers/vega/api_context.c
index 0d04d8e8718..d6bbda5e075 100644
--- a/src/gallium/state_trackers/vega/api_context.c
+++ b/src/gallium/state_trackers/vega/api_context.c
@@ -73,7 +73,8 @@ void vegaFinish(void)
    pipe = ctx->pipe;
 
    pipe->flush(pipe, PIPE_FLUSH_RENDER_CACHE | PIPE_FLUSH_FRAME, &fence);
-
-   pipe->screen->fence_finish(pipe->screen, fence, 0);
-   pipe->screen->fence_reference(pipe->screen, &fence, NULL);
+   if (fence) {
+      pipe->screen->fence_finish(pipe->screen, fence, 0);
+      pipe->screen->fence_reference(pipe->screen, &fence, NULL);
+   }
 }