From patchwork Thu Mar 17 06:58:51 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jialin Zhang X-Patchwork-Id: 552876 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C59B0C433EF for ; Thu, 17 Mar 2022 06:49:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229765AbiCQGue (ORCPT ); Thu, 17 Mar 2022 02:50:34 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42636 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229835AbiCQGud (ORCPT ); Thu, 17 Mar 2022 02:50:33 -0400 Received: from szxga08-in.huawei.com (szxga08-in.huawei.com [45.249.212.255]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E28E1E2F41; Wed, 16 Mar 2022 23:49:17 -0700 (PDT) Received: from dggpemm500021.china.huawei.com (unknown [172.30.72.56]) by szxga08-in.huawei.com (SkyGuard) with ESMTP id 4KJyKs1Kgsz1GBxl; Thu, 17 Mar 2022 14:44:17 +0800 (CST) Received: from localhost.localdomain (10.175.103.91) by dggpemm500021.china.huawei.com (7.185.36.109) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.21; Thu, 17 Mar 2022 14:49:15 +0800 From: Jialin Zhang To: , CC: , , Subject: [PATCH -next] pinctrl: nuvoton: Fix return value check in wpcm450_gpio_register() Date: Thu, 17 Mar 2022 14:58:51 +0800 Message-ID: <20220317065851.495394-1-zhangjialin11@huawei.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-Originating-IP: [10.175.103.91] X-ClientProxiedBy: dggems701-chm.china.huawei.com (10.3.19.178) To dggpemm500021.china.huawei.com (7.185.36.109) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org In case of error, the function devm_platform_ioremap_resource() returns ERR_PTR() and never returns NULL. The NULL test in the return value check should be replaced with IS_ERR(). Fixes: a1d1e0e3d80a ("pinctrl: nuvoton: Add driver for WPCM450") Reported-by: Hulk Robot Signed-off-by: Jialin Zhang --- drivers/pinctrl/nuvoton/pinctrl-wpcm450.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/pinctrl/nuvoton/pinctrl-wpcm450.c b/drivers/pinctrl/nuvoton/pinctrl-wpcm450.c index 661aa963e3fc..a71b684b9b44 100644 --- a/drivers/pinctrl/nuvoton/pinctrl-wpcm450.c +++ b/drivers/pinctrl/nuvoton/pinctrl-wpcm450.c @@ -1019,8 +1019,9 @@ static int wpcm450_gpio_register(struct platform_device *pdev, int ret; pctrl->gpio_base = devm_platform_ioremap_resource(pdev, 0); - if (!pctrl->gpio_base) - return dev_err_probe(dev, -ENOMEM, "Resource fail for GPIO controller\n"); + if (IS_ERR(pctrl->gpio_base)) + return dev_err_probe(dev, PTR_ERR(pctrl->gpio_base), + "Resource fail for GPIO controller\n"); device_for_each_child_node(dev, child) { void __iomem *dat = NULL;