From d0937759db09797836e290220236f61ab0f18259 Mon Sep 17 00:00:00 2001
From: Eric Anholt <eric@anholt.net>
Date: Thu, 4 Oct 2012 13:42:16 -0700
Subject: [PATCH] glx: Allow glXSwapInterval(0) when vblank_mode=0.

There's no reason to say no in this case.
---
 src/glx/dri2_glx.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/glx/dri2_glx.c b/src/glx/dri2_glx.c
index 18542d18201..07a3384d0ab 100644
--- a/src/glx/dri2_glx.c
+++ b/src/glx/dri2_glx.c
@@ -830,7 +830,9 @@ dri2SetSwapInterval(__GLXDRIdrawable *pdraw, int interval)
 
    switch (vblank_mode) {
    case DRI_CONF_VBLANK_NEVER:
-      return GLX_BAD_VALUE;
+      if (interval != 0)
+         return GLX_BAD_VALUE;
+      break;
    case DRI_CONF_VBLANK_ALWAYS_SYNC:
       if (interval <= 0)
 	 return GLX_BAD_VALUE;