From 5675c36e0dca92b8d24235d82cd0e87f82fdc7b0 Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Thu, 16 Aug 2012 20:44:32 +0100
Subject: [PATCH] sna: Check for failure to pin the front buffer

Reported-by: Zdenek Kabelac <zkabelac@redhat.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
---
 src/sna/sna_display.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/sna/sna_display.c b/src/sna/sna_display.c
index 431b5dee..b35a7ccc 100644
--- a/src/sna/sna_display.c
+++ b/src/sna/sna_display.c
@@ -964,6 +964,9 @@ static struct kgem_bo *sna_crtc_attach(xf86CrtcPtr crtc)
 		DBG(("%s: attaching to framebuffer\n", __FUNCTION__));
 		sna_crtc_disable_shadow(sna, sna_crtc);
 		bo = sna_pixmap_pin(sna->front);
+		if (bo == NULL)
+			return NULL;
+
 		if (!get_fb(sna, bo, scrn->virtualX, scrn->virtualY))
 			return NULL;