From d996319cf96d06d37b7860855f0d5756c2bc4777 Mon Sep 17 00:00:00 2001
From: Daniel van Vugt <daniel.van.vugt@canonical.com>
Date: Fri, 9 Jul 2021 16:26:11 +0800
Subject: [PATCH] kms: Add a missing g_set_error on error
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So the GError is not left NULL and then dereferenced.

Fix provided by Jonas Ådahl <jadahl@gmail.com>

Closes: https://gitlab.gnome.org/GNOME/mutter/-/issues/1878
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1925>
---
 src/backends/native/meta-kms-device.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/backends/native/meta-kms-device.c b/src/backends/native/meta-kms-device.c
index f2ca52f47..b4d3e5802 100644
--- a/src/backends/native/meta-kms-device.c
+++ b/src/backends/native/meta-kms-device.c
@@ -312,6 +312,9 @@ meta_create_kms_impl_device (MetaKmsDevice      *device,
             }
         }
 
+      g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
+                   "No suitable mode setting backend found");
+
       return NULL;
     }
 }