drm/qxl: use container_of to resolve qxl_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/qxl/qxl_fb.c b/drivers/gpu/drm/qxl/qxl_fb.c
index df567888bb1e..3d7c1d00a424 100644
--- a/drivers/gpu/drm/qxl/qxl_fb.c
+++ b/drivers/gpu/drm/qxl/qxl_fb.c
@@ -625,7 +625,8 @@ static int qxl_fb_find_or_create_single(
                 struct drm_fb_helper *helper,
                 struct drm_fb_helper_surface_size *sizes)
 {
-        struct qxl_fbdev *qfbdev = (struct qxl_fbdev *)helper;
+        struct qxl_fbdev *qfbdev =
+                container_of(helper, struct qxl_fbdev, helper);
         int new_fb = 0;
         int ret;