drm/cirrus: use container_of to resolve cirrus_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>

diff --git a/drivers/gpu/drm/cirrus/cirrus_fbdev.c b/drivers/gpu/drm/cirrus/cirrus_fbdev.c
index 2a135f2..d231b1c 100644 (file)
--- a/drivers/gpu/drm/cirrus/cirrus_fbdev.c
+++ b/drivers/gpu/drm/cirrus/cirrus_fbdev.c
@@ -160,7 +160,8 @@ static int cirrusfb_create_object(struct cirrus_fbdev *afbdev,
 static int cirrusfb_create(struct drm_fb_helper *helper,
                           struct drm_fb_helper_surface_size *sizes)
 {
-       struct cirrus_fbdev *gfbdev = (struct cirrus_fbdev *)helper;
+       struct cirrus_fbdev *gfbdev =
+               container_of(helper, struct cirrus_fbdev, helper);
        struct drm_device *dev = gfbdev->helper.dev;
        struct cirrus_device *cdev = gfbdev->helper.dev->dev_private;
        struct fb_info *info;