[PATCH 1/1] drm/exynos: Fix potential NULL pointer dereference in exynos_drm_encoder.c

[Sachin Kamat]

Check overlay_ops is not NULL as checked in the previous 'if' condition.
Fixes the following smatch error:
drivers/gpu/drm/exynos/exynos_drm_encoder.c:509 
exynos_drm_encoder_plane_disable()
error: we previously assumed 'overlay_ops' could be null (see line 499)

Signed-off-by: Sachin Kamat <sachin.kamat at linaro.org>
---
 drivers/gpu/drm/exynos/exynos_drm_encoder.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/gpu/drm/exynos/exynos_drm_encoder.c 
b/drivers/gpu/drm/exynos/exynos_drm_encoder.c
index e51503f..a44238e 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_encoder.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_encoder.c
@@ -506,6 +506,6 @@ void exynos_drm_encoder_plane_disable(struct drm_encoder 
*encoder, void *data)
         * because the setting for disabling the overlay will be updated
         * at vsync.
         */
-       if (overlay_ops->wait_for_vblank)
+       if (overlay_ops && overlay_ops->wait_for_vblank)
                overlay_ops->wait_for_vblank(manager->dev);
 }
-- 
1.7.4.1