From 0f4123951599cfdc99b53cde6911990158151293 Mon Sep 17 00:00:00 2001
From: Xaver Hugl <xaver.hugl@gmail.com>
Date: Wed, 1 May 2024 21:24:37 +0200
Subject: [PATCH] waylandserver: set render backend for linuxdrmsyncobj
 directly

The code would previously never set the render backend, causing the use of explicit sync
to fail

BUG: 486391
---
 src/platformsupport/scenes/opengl/abstract_egl_backend.cpp | 4 ----
 src/wayland_server.cpp                                     | 4 ++++
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/platformsupport/scenes/opengl/abstract_egl_backend.cpp b/src/platformsupport/scenes/opengl/abstract_egl_backend.cpp
index 560a680eab..9ab2024924 100644
--- a/src/platformsupport/scenes/opengl/abstract_egl_backend.cpp
+++ b/src/platformsupport/scenes/opengl/abstract_egl_backend.cpp
@@ -192,11 +192,7 @@ void AbstractEglBackend::initWayland()
         LinuxDmaBufV1ClientBufferIntegration *dmabuf = waylandServer()->linuxDmabuf();
         dmabuf->setRenderBackend(this);
         dmabuf->setSupportedFormatsWithModifiers(m_tranches);
-        if (auto syncObj = waylandServer()->linuxSyncObj()) {
-            syncObj->setRenderBackend(this);
-        }
     }
-
     waylandServer()->setRenderBackend(this);
 }
 
diff --git a/src/wayland_server.cpp b/src/wayland_server.cpp
index 36c02cd3eb..eefdde86ff 100644
--- a/src/wayland_server.cpp
+++ b/src/wayland_server.cpp
@@ -855,6 +855,10 @@ void WaylandServer::setRenderBackend(RenderBackend *backend)
         }
     } else if (m_linuxDrmSyncObj) {
         m_linuxDrmSyncObj->remove();
+        m_linuxDrmSyncObj = nullptr;
+    }
+    if (m_linuxDrmSyncObj) {
+        m_linuxDrmSyncObj->setRenderBackend(backend);
     }
 }