[PATCH 6.18 158/333] mmc: mmci: Fix device_node reference leak in of_get_dml_pipe_index()

Greg Kroah-Hartman
2026-03-17T17:16:31Z

From: Felix Gu <ustc.gu@gmail.com>

commit af12e64ae0661546e8b4f5d30d55c5f53a11efe7 upstream.

When calling of_parse_phandle_with_args(), the caller is responsible
to call of_node_put() to release the reference of device node.
In of_get_dml_pipe_index(), it does not release the reference.

Fixes: 9cb15142d0e3 ("mmc: mmci: Add qcom dml support to the driver.")
Signed-off-by: Felix Gu <gu_0233@qq.com>
Cc: stable@vger.kernel.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/mmc/host/mmci_qcom_dml.c | 1 +
1 file changed, 1 insertion(+)

--- a/drivers/mmc/host/mmci_qcom_dml.c
+++ b/drivers/mmc/host/mmci_qcom_dml.c
@@ -109,6 +109,7 @@ static int of_get_dml_pipe_index(struct
&dma_spec))
return -ENODEV;

+ of_node_put(dma_spec.np);
if (dma_spec.args_count)
return dma_spec.args[0];