fix unbalanced lock and make sure mode list has modes so lvds code doesn't crash

diff --git a/linux-core/drm_crtc.c b/linux-core/drm_crtc.c
index 21d7012..63ad829 100644 (file)
--- a/linux-core/drm_crtc.c
+++ b/linux-core/drm_crtc.c
@@ -37,6 +37,7 @@ struct drm_framebuffer *drm_framebuffer_create(drm_device_t *dev)
        spin_lock(&dev->mode_config.config_lock);
        /* Limit to single framebuffer for now */
        if (dev->mode_config.num_fb > 1) {
+               spin_unlock(&dev->mode_config.config_lock);
                DRM_ERROR("Attempt to add multiple framebuffers failed\n");
                return NULL;
        }
@@ -542,6 +543,9 @@ bool drm_initial_config(drm_device_t *dev, struct drm_framebuffer *fb,
        list_for_each_entry(output, &dev->mode_config.output_list, head) {
                struct drm_display_mode *des_mode;
 
+               if (list_empty(&output->modes))
+                       continue;
+
                /* Get the first preferred moded */
                list_for_each_entry(des_mode, &output->modes, head) {
                        if (des_mode->flags & DRM_MODE_TYPE_PREFERRED)