6.18-stable review patch. If anyone has any objections, please let me know.
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From: Miaoqian Lin linmq006@gmail.com
commit a846505a193d7492ad3531e33cacfca31e4bcdd1 upstream.
The function mtk_dp_dt_parse() calls of_graph_get_endpoint_by_regs() to get the endpoint device node, but fails to call of_node_put() to release the reference when the function returns. This results in a device node reference leak.
Fix this by adding the missing of_node_put() call before returning from the function.
Found via static analysis and code review.
Fixes: f70ac097a2cf ("drm/mediatek: Add MT8195 Embedded DisplayPort driver") Cc: stable@vger.kernel.org Signed-off-by: Miaoqian Lin linmq006@gmail.com Reviewed-by: Markus Schneider-Pargmann msp@baylibre.com Reviewed-by: CK Hu ck.hu@mediatek.com Link: https://patchwork.kernel.org/project/dri-devel/patch/20251029072307.10955-1-... Signed-off-by: Chun-Kuang Hu chunkuang.hu@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/gpu/drm/mediatek/mtk_dp.c | 1 + 1 file changed, 1 insertion(+)
--- a/drivers/gpu/drm/mediatek/mtk_dp.c +++ b/drivers/gpu/drm/mediatek/mtk_dp.c @@ -2087,6 +2087,7 @@ static int mtk_dp_dt_parse(struct mtk_dp endpoint = of_graph_get_endpoint_by_regs(pdev->dev.of_node, 1, -1); len = of_property_count_elems_of_size(endpoint, "data-lanes", sizeof(u32)); + of_node_put(endpoint); if (len < 0 || len > 4 || len == 3) { dev_err(dev, "invalid data lane size: %d\n", len); return -EINVAL;