drm/mediatek: ovl_adaptor: Add missing of_node_put()

commit 5beb6fba25db235b52eab34bde8112f07bb31d75 upstream.

Error paths that exit for_each_child_of_node() need to call
of_node_put() to decerement the child refcount and avoid memory leaks.

Add the missing of_node_put().

Cc: stable@vger.kernel.org
Fixes: 453c3364632a ("drm/mediatek: Add ovl_adaptor support for MT8195")
Signed-off-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>
Reviewed-by: CK Hu <ck.hu@mediatek.com>
Link: https://patchwork.kernel.org/project/dri-devel/patch/20240624-mtk_disp_ovl_adaptor_scoped-v1-2-9fa1e074d881@gmail.com/
Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/gpu/drm/mediatek/mtk_disp_ovl_adaptor.c b/drivers/gpu/drm/mediatek/mtk_disp_ovl_adaptor.c
index 1a2a73757370bc9d3c362c92c9c2c51385bb72a9..8c2ba9086873477540688b1f07ccf38a401ecbe1 100644 (file)
--- a/drivers/gpu/drm/mediatek/mtk_disp_ovl_adaptor.c
+++ b/drivers/gpu/drm/mediatek/mtk_disp_ovl_adaptor.c
@@ -523,8 +523,10 @@ static int ovl_adaptor_comp_init(struct device *dev, struct component_match **ma
                }
 
                comp_pdev = of_find_device_by_node(node);
-               if (!comp_pdev)
+               if (!comp_pdev) {
+                       of_node_put(node);
                        return -EPROBE_DEFER;
+               }
 
                priv->ovl_adaptor_comp[id] = &comp_pdev->dev;