From: Dave Airlie <airlied@redhat.com>
Date: Wed, 4 Jun 2008 05:17:13 +0000 (+1000)
Subject: drm: fix hotplug oops
X-Git-Tag: submit/1.0/20121108.012404~642^2~155
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=cf1964f971cc298ece91064953f7d00ed13e541d;p=profile%2Fivi%2Flibdrm.git

drm: fix hotplug oops
---

diff --git a/linux-core/drm_crtc_helper.c b/linux-core/drm_crtc_helper.c
index 58d21b9..4083d6b 100644
--- a/linux-core/drm_crtc_helper.c
+++ b/linux-core/drm_crtc_helper.c
@@ -712,9 +712,11 @@ int drm_helper_hotplug_stage_two(struct drm_device *dev, struct drm_connector *c
 		return 0;
 	}
 
-	if (connector->encoder->crtc && connector->encoder->crtc->desired_mode) {
-		DRM_DEBUG("drm thinks that the connector already has a config\n");
-		has_config = 1;
+	if (connector->encoder) {
+		if (connector->encoder->crtc && connector->encoder->crtc->desired_mode) {
+			DRM_DEBUG("drm thinks that the connector already has a config\n");
+			has_config = 1;
+		}
 	}
 
 	drm_helper_probe_connector_modes(dev, 2048, 2048);
@@ -722,6 +724,11 @@ int drm_helper_hotplug_stage_two(struct drm_device *dev, struct drm_connector *c
 	if (!has_config)
 		drm_pick_crtcs(dev);
 
+	if (!connector->encoder) {
+		DRM_DEBUG("could not find a desired mode or crtc for connector\n");
+		return 1;
+	}
+
 	if (!connector->encoder->crtc || !connector->encoder->crtc->desired_mode) {
 		DRM_DEBUG("could not find a desired mode or crtc for connector\n");
 		return 1;