[PATCH 5.10 202/290] usb: dwc3: qcom: Add missing DWC3 OF node refcount decrement

From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

From: Serge Semin <redacted>

commit 1cffb1c66499a9db9a735473778abf8427d16287 upstream.

of_get_child_by_name() increments the reference counter of the OF node it
managed to find. So after the code is done using the device node, the
refcount must be decremented. Add missing of_node_put() invocation then
to the dwc3_qcom_of_register_core() method, since DWC3 OF node is being
used only there.

Fixes: a4333c3a6ba9 ("usb: dwc3: Add Qualcomm DWC3 glue driver")
Signed-off-by: Serge Semin <redacted>
Link: https://lore.kernel.org/r/20210212205521.14280-1-Sergey.Semin@baikalelectronics.ru (local)
Cc: stable <redacted>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/dwc3/dwc3-qcom.c |    9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

--- a/drivers/usb/dwc3/dwc3-qcom.c
+++ b/drivers/usb/dwc3/dwc3-qcom.c

@@ -639,16 +639,19 @@ static int dwc3_qcom_of_register_core(st
 	ret = of_platform_populate(np, NULL, NULL, dev);
 	if (ret) {
 		dev_err(dev, "failed to register dwc3 core - %d\n", ret);
-		return ret;
+		goto node_put;
 	}
 
 	qcom->dwc3 = of_find_device_by_node(dwc3_np);
 	if (!qcom->dwc3) {
+		ret = -ENODEV;
 		dev_err(dev, "failed to get dwc3 platform device\n");
-		return -ENODEV;
 	}
 
-	return 0;
+node_put:
+	of_node_put(dwc3_np);
+
+	return ret;
 }
 
 static int dwc3_qcom_probe(struct platform_device *pdev)