From patchwork Thu Sep 9 09:06:08 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yang Yingliang X-Patchwork-Id: 12482765 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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 751EBC433F5 for ; Thu, 9 Sep 2021 09:00:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4CDBC61139 for ; Thu, 9 Sep 2021 09:00:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231825AbhIIJB7 (ORCPT ); Thu, 9 Sep 2021 05:01:59 -0400 Received: from szxga01-in.huawei.com ([45.249.212.187]:19019 "EHLO szxga01-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231281AbhIIJB6 (ORCPT ); Thu, 9 Sep 2021 05:01:58 -0400 Received: from dggemv704-chm.china.huawei.com (unknown [172.30.72.54]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4H4tCy73dqzbmFN; Thu, 9 Sep 2021 16:56:46 +0800 (CST) Received: from dggpeml500017.china.huawei.com (7.185.36.243) by dggemv704-chm.china.huawei.com (10.3.19.47) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.8; Thu, 9 Sep 2021 17:00:48 +0800 Received: from huawei.com (10.175.103.91) by dggpeml500017.china.huawei.com (7.185.36.243) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.8; Thu, 9 Sep 2021 17:00:48 +0800 From: Yang Yingliang To: , CC: Subject: [PATCH] n64cart: fix return value check in n64cart_probe() Date: Thu, 9 Sep 2021 17:06:08 +0800 Message-ID: <20210909090608.2989716-1-yangyingliang@huawei.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-Originating-IP: [10.175.103.91] X-ClientProxiedBy: dggems705-chm.china.huawei.com (10.3.19.182) To dggpeml500017.china.huawei.com (7.185.36.243) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-block@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: d9b2a2bbbb4d ("block: Add n64 cart driver") Reported-by: Hulk Robot Signed-off-by: Yang Yingliang Reviewed-by: Chaitanya Kulkarni --- drivers/block/n64cart.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/block/n64cart.c b/drivers/block/n64cart.c index c84be0028f63..26798da661bd 100644 --- a/drivers/block/n64cart.c +++ b/drivers/block/n64cart.c @@ -129,8 +129,8 @@ static int __init n64cart_probe(struct platform_device *pdev) } reg_base = devm_platform_ioremap_resource(pdev, 0); - if (!reg_base) - return -EINVAL; + if (IS_ERR(reg_base)) + return PTR_ERR(reg_base); disk = blk_alloc_disk(NUMA_NO_NODE); if (!disk)