From 49099c4991da3c94773f888aea2e9d27b8a7c6d1 Mon Sep 17 00:00:00 2001 From: Dave Airlie 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, this tests drm_class is NULL, and sets it to NULL in the fail paths. Reported-by: Fengguang Wu Signed-off-by: Dave Airlie --- drivers/gpu/drm/drm_sysfs.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/drm_sysfs.c b/drivers/gpu/drm/drm_sysfs.c index 45cf1dd3eb9c..45ac8d6c92b7 100644 --- a/drivers/gpu/drm/drm_sysfs.c +++ b/drivers/gpu/drm/drm_sysfs.c @@ -134,6 +134,7 @@ void drm_sysfs_destroy(void) return; class_remove_file(drm_class, &class_attr_version.attr); class_destroy(drm_class); + drm_class = NULL; } /** @@ -554,6 +555,9 @@ 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); } -- GitLab