In function st_dwc3_probe, variable child_pdev takes the value returned
by of_find_device_by_node, which gets a device pointer but does not put
it. If child_pdev is not put before the probe function returns, it may
cause a reference leak. Hence put child_pdev after its last usage.
Issue found with Coccinelle.

Signed-off-by: Nishka Dasgupta <>
 drivers/usb/dwc3/dwc3-st.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/usb/dwc3/dwc3-st.c b/drivers/usb/dwc3/dwc3-st.c
index 6f52c749cd58..c682420f25ca 100644
--- a/drivers/usb/dwc3/dwc3-st.c
+++ b/drivers/usb/dwc3/dwc3-st.c
@@ -274,6 +274,7 @@ static int st_dwc3_probe(struct platform_device *pdev)
        dwc3_data->dr_mode = usb_get_dr_mode(&child_pdev->dev);
+       of_dev_put(child_pdev);
         * Configure the USB port as device or host according to the static

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