From 3cc9a28b9b493d2426e2f182fc26b9da847e0c7f Mon Sep 17 00:00:00 2001
From: Dave Airlie <airlied@redhat.com>
Date: Sat, 15 Aug 2009 20:30:45 +1000
Subject: r300: add just in case warn I don't think this can actually happen

---
 src/mesa/drivers/dri/r300/r300_render.c | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'src')

diff --git a/src/mesa/drivers/dri/r300/r300_render.c b/src/mesa/drivers/dri/r300/r300_render.c
index 8e6b4967ef1..4bf09c2e89a 100644
--- a/src/mesa/drivers/dri/r300/r300_render.c
+++ b/src/mesa/drivers/dri/r300/r300_render.c
@@ -380,6 +380,11 @@ void r300RunRenderPrimitive(GLcontext * ctx, int start, int end, int prim)
 				    if (align % 4)
 					nr -= incr;
 				} while(align % 4);
+				if (nr <= 0) {
+					WARN_ONCE("did the impossible happen? we never aligned nr to dword\n");
+					return;
+				}
+					
 			}
 			r300FireEB(rmesa, nr, type, offset);
 
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