drm/stm: ltdc: fix warnings in ltdc_plane_create()

"make C=1" returns 2 warnings in ltdc_plane_create()
("Using plain integer as NULL pointer"). This patch
fixes them.

Signed-off-by: Philippe Cornu <philippe.cornu@st.com>
Reviewed-by: Yannick Fertré <yannick.fertre@st.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180419132804.8317-1-philippe.cornu@st.com

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/gpu/drm/stm/ltdc.c b/drivers/gpu/drm/stm/ltdc.c
index 616191fe98ae..d997a6014d6c 100644
--- a/drivers/gpu/drm/stm/ltdc.c
+++ b/drivers/gpu/drm/stm/ltdc.c
@@ -860,13 +860,13 @@ static struct drm_plane *ltdc_plane_create(struct drm_device *ddev,
 
         plane = devm_kzalloc(dev, sizeof(*plane), GFP_KERNEL);
         if (!plane)
-                return 0;
+                return NULL;
 
         ret = drm_universal_plane_init(ddev, plane, possible_crtcs,
                                        &ltdc_plane_funcs, formats, nb_fmt,
                                        NULL, type, NULL);
         if (ret < 0)
-                return 0;
+                return NULL;
 
         drm_plane_helper_add(plane, &ltdc_plane_helper_funcs);