don't crash if no desired mode

diff --git a/linux-core/drm_crtc.c b/linux-core/drm_crtc.c
index 0fb5b9a..437259d 100644 (file)
--- a/linux-core/drm_crtc.c
+++ b/linux-core/drm_crtc.c
@@ -572,7 +572,7 @@ bool drm_initial_config(drm_device_t *dev, bool can_grow)
 
        /* bind analog output to one crtc */
        list_for_each_entry(output, &dev->mode_config.output_list, head) {
-               struct drm_display_mode *des_mode;
+               struct drm_display_mode *des_mode = NULL;
 
                if (list_empty(&output->modes))
                        continue;
@@ -582,6 +582,10 @@ bool drm_initial_config(drm_device_t *dev, bool can_grow)
                        if (des_mode->flags & DRM_MODE_TYPE_PREFERRED)
                                break;
                }
+
+               if (!des_mode)
+                       continue;
+
                if (!strncmp(output->name, "VGA", 3)) {
                        DRM_DEBUG("VGA preferred mode: %s\n", des_mode->name);
                        drm_setup_output(output, vga_crtc, des_mode);