The patch below does not apply to the 4.19-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 1cffb1c66499a9db9a735473778abf8427d16287 Mon Sep 17 00:00:00 2001

From: Serge Semin Sergey.Semin@baikalelectronics.ru Date: Fri, 12 Feb 2021 23:55:19 +0300 Subject: [PATCH] usb: dwc3: qcom: Add missing DWC3 OF node refcount decrement

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 Sergey.Semin@baikalelectronics.ru Link: https://lore.kernel.org/r/20210212205521.14280-1-Sergey.Semin@baikalelectron... Cc: stable stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

diff --git a/drivers/usb/dwc3/dwc3-qcom.c b/drivers/usb/dwc3/dwc3-qcom.c index 730e8d6a2aa6..fcaf04483ad0 100644 --- a/drivers/usb/dwc3/dwc3-qcom.c +++ b/drivers/usb/dwc3/dwc3-qcom.c @@ -653,16 +653,19 @@ static int dwc3_qcom_of_register_core(struct platform_device *pdev) 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 struct platform_device *