[PATCH -next] drm/omap: Fix NULL but dereferenced coccicheck error

[Yang Li]

Eliminate the following coccicheck warning:
./drivers/gpu/drm/omapdrm/omap_overlay.c:89:22-25: ERROR: r_ovl is NULL
but dereferenced.

Reported-by: Abaci Robot <ab...@linux.alibaba.com>
Fixes: e02b5cc9e898 ("drm/omap: Add a 'right overlay' to plane state")
Signed-off-by: Yang Li <yang....@linux.alibaba.com>
---
 drivers/gpu/drm/omapdrm/omap_overlay.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/omapdrm/omap_overlay.c 
b/drivers/gpu/drm/omapdrm/omap_overlay.c
index 10730c9b2752..b0bc9ad2ef73 100644
--- a/drivers/gpu/drm/omapdrm/omap_overlay.c
+++ b/drivers/gpu/drm/omapdrm/omap_overlay.c
@@ -86,7 +86,7 @@ int omap_overlay_assign(struct drm_atomic_state *s, struct 
drm_plane *plane,
                r_ovl = omap_plane_find_free_overlay(s->dev, overlay_map,
                                                     caps, fourcc);
                if (!r_ovl) {
-                       overlay_map[r_ovl->idx] = NULL;
+                       overlay_map[ovl->idx] = NULL;
                        *overlay = NULL;
                        return -ENOMEM;
                }
-- 
2.20.1.7.g153144c