[PATCH] drm/exynos: Fix potential NULL pointer dereference

[Sachin Kamat]

drm_mode_create() returns NULL if it fails to create
a new display mode. Check the value returned to avoid NULL
pointer deferencing later.

Signed-off-by: Sachin Kamat <sachin.kamat at linaro.org>
---
 drivers/gpu/drm/exynos/exynos_drm_connector.c |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)

diff --git a/drivers/gpu/drm/exynos/exynos_drm_connector.c b/drivers/gpu/drm/exynos/exynos_drm_connector.c
index 9dce3b9..485e984 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_connector.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_connector.c
@@ -149,8 +149,12 @@ static int exynos_drm_connector_get_modes(struct drm_connector *connector)
 		count = drm_add_edid_modes(connector, edid);
 		kfree(edid);
 	} else {
-		struct drm_display_mode *mode = drm_mode_create(connector->dev);
 		struct exynos_drm_panel_info *panel;
+		struct drm_display_mode *mode = drm_mode_create(connector->dev);
+		if (!mode) {
+			DRM_ERROR("failed to create a new display mode.\n");
+			return 0;
+		}
 
 		if (display_ops->get_panel)
 			panel = display_ops->get_panel(manager->dev);
-- 
1.7.4.1