> 2026年6月26日 21:28，WenTao Liang <[email protected]> 写道：
>
> In the for_each_child_of_node loop, private->comp_node[comp_id] and
> private->mutex_node are assigned via of_node_get without first releasing
> any previously stored reference for the same index. When the same comp_id
> or mmsys_id matches multiple nodes, earlier node references are
> overwritten and permanently leaked.
>
> Cc: [email protected]
> Fixes: 1ef7ed48356c ("drm/mediatek: Modify mediatek-drm for mt8195 multi
> mmsys support")
> Signed-off-by: WenTao Liang <[email protected]>
> ---
> drivers/gpu/drm/mediatek/mtk_drm_drv.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> index c86a3f54f35b..2c0d8db9ade2 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> @@ -1138,6 +1138,7 @@ static int mtk_drm_probe(struct platform_device *pdev)
>
> id = of_alias_get_id(node, "mutex");
> if (id < 0 || id == private->data->mmsys_id) {
> + of_node_put(private->mutex_node);
> private->mutex_node = of_node_get(node);
> dev_dbg(dev, "get mutex for mmsys %d",
> private->data->mmsys_id);
> }
> @@ -1153,7 +1154,7 @@ static int mtk_drm_probe(struct platform_device *pdev)
>
> if (!mtk_drm_find_mmsys_comp(private, comp_id))
> continue;
> -
> + of_node_put(private->comp_node[comp_id]);
> private->comp_node[comp_id] = of_node_get(node);
>
> /*
> --
> 2.39.5 (Apple Git-154)
Please ignore this patch. I will resend a proper version after
learning the kernel submission process.
Apologies for the noise.
Best regards,
WenTao Liang
