From 1dbef2d5ed1f447589d688bc8708995291c0260d Mon Sep 17 00:00:00 2001
From: Vlad Zahorodnii <vlad.zahorodnii@kde.org>
Date: Mon, 24 Jun 2024 12:32:24 +0300
Subject: [PATCH] backends/drm: Fix DrmCrtc::queryCurrentMode() accidentally
 resetting m_crtc to null

Otherwise kwin will likely crash.
---
 src/backends/drm/drm_crtc.cpp | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/backends/drm/drm_crtc.cpp b/src/backends/drm/drm_crtc.cpp
index d632877c83..ba5e1d9498 100644
--- a/src/backends/drm/drm_crtc.cpp
+++ b/src/backends/drm/drm_crtc.cpp
@@ -58,8 +58,12 @@ bool DrmCrtc::updateProperties()
 
 drmModeModeInfo DrmCrtc::queryCurrentMode()
 {
-    m_crtc.reset(drmModeGetCrtc(gpu()->fd(), id()));
-    return m_crtc->mode;
+    DrmUniquePtr<drmModeCrtc> crtc(drmModeGetCrtc(gpu()->fd(), id()));
+    if (crtc) {
+        return crtc->mode;
+    } else {
+        return m_crtc->mode;
+    }
 }
 
 int DrmCrtc::pipeIndex() const