[PATCH 2/2] drm/panel: himax-hx83102: Add a check to prevent NULL pointer dereference

[Zhang Zekun]

drm_mode_duplicate() could return NULL due to lack of memory,
which will then call NULL pointer dereference. Add a check to
prevent it.

Fixes: 0ef94554dc40 ("drm/panel: himax-hx83102: Break out as separate driver")
Signed-off-by: Zhang Zekun <zhangzekun11 at huawei.com>
---
 drivers/gpu/drm/panel/panel-himax-hx83102.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/panel/panel-himax-hx83102.c b/drivers/gpu/drm/panel/panel-himax-hx83102.c
index 8b48bba18131..3644a7544b93 100644
--- a/drivers/gpu/drm/panel/panel-himax-hx83102.c
+++ b/drivers/gpu/drm/panel/panel-himax-hx83102.c
@@ -565,6 +565,8 @@ static int hx83102_get_modes(struct drm_panel *panel,
 	struct drm_display_mode *mode;
 
 	mode = drm_mode_duplicate(connector->dev, m);
+	if (!mode)
+		return -ENOMEM;
 
 	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
 	drm_mode_set_name(mode);
-- 
2.17.1