From 50c39e202b4853b28fb6b2be8a7d78cc3835ad2a Mon Sep 17 00:00:00 2001
From: Xaver Hugl <xaver.hugl@gmail.com>
Date: Mon, 22 Nov 2021 09:00:50 +0100
Subject: [PATCH] backends/drm: properly check for vrr property with legacy

BUG: 445907
---
 src/backends/drm/drm_pipeline.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/backends/drm/drm_pipeline.cpp b/src/backends/drm/drm_pipeline.cpp
index 6adeb107bd..462d88a5eb 100644
--- a/src/backends/drm/drm_pipeline.cpp
+++ b/src/backends/drm/drm_pipeline.cpp
@@ -367,7 +367,7 @@ bool DrmPipeline::applyPendingChangesLegacy()
     }
     if (pending.active) {
         Q_ASSERT(pending.crtc);
-        if (auto vrr = pending.crtc->getProp(DrmCrtc::PropertyIndex::VrrEnabled); !vrr->setPropertyLegacy(pending.syncMode == RenderLoopPrivate::SyncMode::Adaptive)) {
+        if (auto vrr = pending.crtc->getProp(DrmCrtc::PropertyIndex::VrrEnabled); vrr && !vrr->setPropertyLegacy(pending.syncMode == RenderLoopPrivate::SyncMode::Adaptive)) {
             qCWarning(KWIN_DRM) << "Setting vrr failed!" << strerror(errno);
             return false;
         }