From: Michel Dänzer <michel@tungstengraphics.com>
Date: Tue, 27 Mar 2007 07:19:51 +0000 (+0200)
Subject: r300: Check ctx->WinSysDrawBuffer before calling function that dereferences it.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=63c57a14d3e9419434bb9ee4d0c5c0d64f2e7847;p=mesa.git

r300: Check ctx->WinSysDrawBuffer before calling function that dereferences it.

Fixes https://bugs.freedesktop.org/show_bug.cgi?id=10417 .
---

diff --git a/src/mesa/drivers/dri/r300/radeon_lock.c b/src/mesa/drivers/dri/r300/radeon_lock.c
index 1a2dfca7b0d..b331cfae6af 100644
--- a/src/mesa/drivers/dri/r300/radeon_lock.c
+++ b/src/mesa/drivers/dri/r300/radeon_lock.c
@@ -55,7 +55,7 @@ static void radeonUpdatePageFlipping(radeonContextPtr radeon)
 	int use_back;
 
 	radeon->doPageFlip = radeon->sarea->pfState;
-        if (!radeon->doPageFlip) {
+        if (!radeon->doPageFlip && radeon->glCtx->WinSysDrawBuffer) {
            driFlipRenderbuffers(radeon->glCtx->WinSysDrawBuffer, GL_FALSE);
         }