From 14516988e095ed748e738c14a87c3656006846f7 Mon Sep 17 00:00:00 2001
From: Qiang Yu <Qiang.Yu@amd.com>
Date: Tue, 10 Jan 2017 18:51:55 +0800
Subject: randr: fix xserver crash when xrandr setprovideroutputsource

xrandr --setprovideroutputsource <screen> <gpu screen>
Xorg: ../../../xserver/dix/dispatch.c:4018: AttachOutputGPU:
Assertion `new->isGPU' failed.

GPUScreen is not allowed to be sink output.

Signed-off-by: Qiang Yu <Qiang.Yu@amd.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
(cherry picked from commit 555e0a42d138ac8d83af62638752a1bebad602d6)
---
 randr/rrprovider.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/randr/rrprovider.c b/randr/rrprovider.c
index f9df67e0b..e4bc2bf6a 100644
--- a/randr/rrprovider.c
+++ b/randr/rrprovider.c
@@ -338,6 +338,9 @@ ProcRRSetProviderOutputSource(ClientPtr client)
     pScreen = provider->pScreen;
     pScrPriv = rrGetScrPriv(pScreen);
 
+    if (!pScreen->isGPU)
+        return BadValue;
+
     pScrPriv->rrProviderSetOutputSource(pScreen, provider, source_provider);
 
     RRInitPrimeSyncProps(pScreen);
-- 
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