From 8f059592969d0b21b873be5db26df262d1dc1fa1 Mon Sep 17 00:00:00 2001 From: Johan Hovold Date: Tue, 23 Sep 2025 17:23:38 +0200 Subject: [PATCH] drm/mediatek: Fix probe device leaks commit 2a2a04be8e869a19c9f950b89b1e05832a0f7ec7 upstream. Make sure to drop the reference taken to each component device during probe on probe failure (e.g. probe deferral) and on driver unbind. Fixes: 6ea6f8276725 ("drm/mediatek: Use correct device pointer to get CMDQ client register") Cc: stable@vger.kernel.org # 5.12 Cc: Chun-Kuang Hu Signed-off-by: Johan Hovold Reviewed-by: AngeloGioacchino Del Regno Link: https://patchwork.kernel.org/project/dri-devel/patch/20250923152340.18234-4-johan@kernel.org/ Signed-off-by: Chun-Kuang Hu Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/mediatek/mtk_ddp_comp.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/gpu/drm/mediatek/mtk_ddp_comp.c b/drivers/gpu/drm/mediatek/mtk_ddp_comp.c index 31d67a131c50..9672ea1f91a2 100644 --- a/drivers/gpu/drm/mediatek/mtk_ddp_comp.c +++ b/drivers/gpu/drm/mediatek/mtk_ddp_comp.c @@ -621,6 +621,13 @@ int mtk_find_possible_crtcs(struct drm_device *drm, struct device *dev) return ret; } +static void mtk_ddp_comp_put_device(void *_dev) +{ + struct device *dev = _dev; + + put_device(dev); +} + static void mtk_ddp_comp_clk_put(void *_clk) { struct clk *clk = _clk; @@ -656,6 +663,10 @@ int mtk_ddp_comp_init(struct device *dev, struct device_node *node, struct mtk_d } comp->dev = &comp_pdev->dev; + ret = devm_add_action_or_reset(dev, mtk_ddp_comp_put_device, comp->dev); + if (ret) + return ret; + if (type == MTK_DISP_AAL || type == MTK_DISP_BLS || type == MTK_DISP_CCORR ||