From patchwork Fri Feb 12 20:55:19 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Serge Semin X-Patchwork-Id: 12086047 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 520DFC433DB for ; Fri, 12 Feb 2021 20:56:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2163B64DE9 for ; Fri, 12 Feb 2021 20:56:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231611AbhBLU4W (ORCPT ); Fri, 12 Feb 2021 15:56:22 -0500 Received: from mail.baikalelectronics.com ([87.245.175.226]:40504 "EHLO mail.baikalelectronics.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231445AbhBLU4M (ORCPT ); Fri, 12 Feb 2021 15:56:12 -0500 From: Serge Semin To: Felipe Balbi , Greg Kroah-Hartman , Rob Herring , Andy Gross , Bjorn Andersson , Manu Gautam CC: Serge Semin , Serge Semin , , , Felipe Balbi , , Subject: [PATCH v7 1/3] usb: dwc3: qcom: Add missing DWC3 OF node refcount decrement Date: Fri, 12 Feb 2021 23:55:19 +0300 Message-ID: <20210212205521.14280-1-Sergey.Semin@baikalelectronics.ru> MIME-Version: 1.0 X-ClientProxiedBy: MAIL.baikal.int (192.168.51.25) To mail (192.168.51.25) Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org 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 --- Note the patch will get cleanly applied on the commit 2bc02355f8ba ("usb: dwc3: qcom: Add support for booting with ACPI"), while the bug has been there since the Qualcomm DWC3 glue driver was submitted. Changelog v7: - This is a new patch. Please drop it If I missed something and the OF node refcount decrement wasn't supposed to be there. --- drivers/usb/dwc3/dwc3-qcom.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/drivers/usb/dwc3/dwc3-qcom.c b/drivers/usb/dwc3/dwc3-qcom.c index c703d552bbcf..3564d00cdce3 100644 --- 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(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 int dwc3_qcom_probe(struct platform_device *pdev)