From 1f92dc5e5d36df00ec129d554203951047d34a73 Mon Sep 17 00:00:00 2001
From: Xaver Hugl <xaver.hugl@gmail.com>
Date: Sat, 1 Oct 2022 20:57:33 +0200
Subject: [PATCH] backends/drm: correct test buffer check

There can be situations where the surface fits but there's no test buffer yet
---
 src/backends/drm/drm_egl_layer.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/backends/drm/drm_egl_layer.cpp b/src/backends/drm/drm_egl_layer.cpp
index 7ba07fbae5..b9e7c09fc5 100644
--- a/src/backends/drm/drm_egl_layer.cpp
+++ b/src/backends/drm/drm_egl_layer.cpp
@@ -68,7 +68,7 @@ QRegion EglGbmLayer::currentDamage() const
 
 bool EglGbmLayer::checkTestBuffer()
 {
-    if (!m_surface.doesSurfaceFit(m_pipeline->bufferSize(), m_pipeline->formats())) {
+    if (!m_currentBuffer || !m_surface.doesSurfaceFit(m_pipeline->bufferSize(), m_pipeline->formats())) {
         const auto buffer = m_surface.renderTestBuffer(m_pipeline->bufferSize(), m_pipeline->formats());
         if (!buffer) {
             return false;