drm/udl: use container_of to resolve udl_fbdev from drm_fb_helper

Use container_of instead of casting first structure member.

Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/gpu/drm/udl/udl_fb.c b/drivers/gpu/drm/udl/udl_fb.c
index d1da339843ca..8cbcb4589bd3 100644
--- a/drivers/gpu/drm/udl/udl_fb.c
+++ b/drivers/gpu/drm/udl/udl_fb.c
@@ -472,7 +472,8 @@ udl_framebuffer_init(struct drm_device *dev,
 static int udlfb_create(struct drm_fb_helper *helper,
                         struct drm_fb_helper_surface_size *sizes)
 {
-        struct udl_fbdev *ufbdev = (struct udl_fbdev *)helper;
+        struct udl_fbdev *ufbdev =
+                container_of(helper, struct udl_fbdev, helper);
         struct drm_device *dev = ufbdev->helper.dev;
         struct fb_info *info;
         struct device *device = dev->dev;