From 1799680f7bd84e0618f34f4c7486799521ddaf83 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Michel=20D=C3=A4nzer?= <michel.daenzer@amd.com>
Date: Fri, 24 Aug 2018 10:56:58 +0200
Subject: [PATCH] Handle ihandle == -1 in radeon_set_shared_pixmap_backing

It means to stop using the shared pixmap backing.

Fixes crash when changing PRIME slave output configuration.
---
 src/radeon_bo_helper.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/radeon_bo_helper.c b/src/radeon_bo_helper.c
index 79e8ff1b..da5a484f 100644
--- a/src/radeon_bo_helper.c
+++ b/src/radeon_bo_helper.c
@@ -454,6 +454,9 @@ Bool radeon_set_shared_pixmap_backing(PixmapPtr ppix, void *fd_handle,
     uint32_t size = ppix->devKind * ppix->drawable.height;
     Bool ret = FALSE;
 
+    if (ihandle == -1)
+	return radeon_set_pixmap_bo(ppix, NULL);
+
     bo = (struct radeon_buffer *)calloc(1, sizeof(struct radeon_buffer));
     if (!bo)
 	goto error;