[PATCH] drm/mediatek: check for memory allocation failure

[Christophe JAILLET]

If 'devm_kmalloc_array' returns NULL, we should return -ENOMEM as already
done a few lines above instead of deferencing a NULL pointer a few lines
below.

Signed-off-by: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>
---
 drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
index 6582e1f56d37..cb32c9369f3a 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
@@ -559,6 +559,8 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev,
 	mtk_crtc->ddp_comp = devm_kmalloc_array(dev, mtk_crtc->ddp_comp_nr,
 						sizeof(*mtk_crtc->ddp_comp),
 						GFP_KERNEL);
+	if (!mtk_crtc->ddp_comp)
+		return -ENOMEM;
 
 	mtk_crtc->mutex = mtk_disp_mutex_get(priv->mutex_dev, pipe);
 	if (IS_ERR(mtk_crtc->mutex)) {
-- 
2.11.0