[PATCH] drm/mediatek: fix device leaks at bind - Linux-stable-mirror

22 Jul 2025

Make sure to drop the references to the sibling platform devices and
their child drm devices taken by of_find_device_by_node() and
device_find_child() when initialising the driver data during bind().
Fixes: 1ef7ed48356c ("drm/mediatek: Modify mediatek-drm for mt8195 multi mmsys support")
Cc: stable@vger.kernel.org	# 6.4
Cc: Nancy.Lin nancy.lin@mediatek.com
Signed-off-by: Johan Hovold johan@kernel.org
---
 drivers/gpu/drm/mediatek/mtk_drm_drv.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
index 7c0c12dde488..33b83576af7e 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
@@ -395,10 +395,12 @@ static bool mtk_drm_get_all_drm_priv(struct device *dev)
    		continue;
drm_dev = device_find_child(&pdev->dev, NULL, mtk_drm_match);
+		put_device(&pdev->dev);
    	if (!drm_dev)
    		continue;
temp_drm_priv = dev_get_drvdata(drm_dev);
+		put_device(drm_dev);
    	if (!temp_drm_priv)
    		continue;
-- 
2.49.1



    