mmc: mmci: Fix device_node reference leak in of_get_dml_pipe_index()

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>

diff --git a/drivers/mmc/host/mmci_qcom_dml.c b/drivers/mmc/host/mmci_qcom_dml.c
index 3da6112fbe39dbb02200f74b4fe8dccba55644e2..67371389cc33119ad9a8bdbe2751238c78aabe48 100644 (file)
--- 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 device_node *np, const char *name)
                                       &dma_spec))
                return -ENODEV;
 
+       of_node_put(dma_spec.np);
        if (dma_spec.args_count)
                return dma_spec.args[0];