From eeb21a133b982f71de739baf62e53c8a68f5d495 Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Mon, 24 Jan 2011 11:17:03 +0000
Subject: VidMode: prevent crash with no modes

Bugzilla:  https://bugs.freedesktop.org/show_bug.cgi?id=17431

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Jeremy Huddleston <jeremyhu@apple.com>
---
 hw/xfree86/common/xf86VidMode.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/hw/xfree86/common/xf86VidMode.c b/hw/xfree86/common/xf86VidMode.c
index 4dd454d8b..2ae5484e3 100644
--- a/hw/xfree86/common/xf86VidMode.c
+++ b/hw/xfree86/common/xf86VidMode.c
@@ -221,6 +221,9 @@ VidModeGetFirstModeline(int scrnIndex, pointer *mode, int *dotClock)
 	return FALSE;
 
     pScrn = xf86Screens[scrnIndex];
+    if (pScrn->modes == NULL)
+	    return FALSE;
+
     pVidMode = VMPTR(pScrn->pScreen);
     pVidMode->First = pScrn->modes;
     pVidMode->Next =  pVidMode->First->next;
-- 
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