From 15ef50e9bba1fb52f8f4b4b48d29c6750b72fad9 Mon Sep 17 00:00:00 2001
From: Dave Airlie <airlied@gmail.com>
Date: Fri, 6 Jul 2012 18:06:42 +0100
Subject: [PATCH] drm: fail gracefully when proc isn't setup.

If drm can't find proc it should fail more gracefully, than just
oopsing.

Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
---
 drivers/gpu/drm/drm_sysfs.c |    3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/drm_sysfs.c b/drivers/gpu/drm/drm_sysfs.c
index 45cf1dd..de8c636 100644
--- a/drivers/gpu/drm/drm_sysfs.c
+++ b/drivers/gpu/drm/drm_sysfs.c
@@ -554,6 +554,9 @@ void drm_sysfs_device_remove(struct drm_minor *minor)
 
 int drm_class_device_register(struct device *dev)
 {
+	if (!drm_class || IS_ERR(drm_class))
+		return -ENOENT;
+
 	dev->class = drm_class;
 	return device_register(dev);
 }
-- 
1.7.10.4