6.18-stable review patch. If anyone has any objections, please let me know.
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From: Johan Hovold johan@kernel.org
commit e0f44f74ed6313e50b38eb39a2c7f210ae208db2 upstream.
Make sure to drop the references taken to the component devices by of_find_device_by_node() during probe on probe failure (e.g. probe deferral) and on driver unbind.
Fixes: 453c3364632a ("drm/mediatek: Add ovl_adaptor support for MT8195") Cc: stable@vger.kernel.org # 6.4 Cc: Nancy.Lin nancy.lin@mediatek.com Signed-off-by: Johan Hovold johan@kernel.org Reviewed-by: AngeloGioacchino Del Regno angelogioacchino.delregno@collabora.com Link: https://patchwork.kernel.org/project/dri-devel/patch/20250923152340.18234-6-... Signed-off-by: Chun-Kuang Hu chunkuang.hu@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/gpu/drm/mediatek/mtk_disp_ovl_adaptor.c | 12 ++++++++++++ 1 file changed, 12 insertions(+)
--- a/drivers/gpu/drm/mediatek/mtk_disp_ovl_adaptor.c +++ b/drivers/gpu/drm/mediatek/mtk_disp_ovl_adaptor.c @@ -527,6 +527,13 @@ bool mtk_ovl_adaptor_is_comp_present(str type == OVL_ADAPTOR_TYPE_PADDING; }
+static void ovl_adaptor_put_device(void *_dev) +{ + struct device *dev = _dev; + + put_device(dev); +} + static int ovl_adaptor_comp_init(struct device *dev, struct component_match **match) { struct mtk_disp_ovl_adaptor *priv = dev_get_drvdata(dev); @@ -560,6 +567,11 @@ static int ovl_adaptor_comp_init(struct if (!comp_pdev) return -EPROBE_DEFER;
+ ret = devm_add_action_or_reset(dev, ovl_adaptor_put_device, + &comp_pdev->dev); + if (ret) + return ret; + priv->ovl_adaptor_comp[id] = &comp_pdev->dev;
drm_of_component_match_add(dev, match, component_compare_of, node);