From mboxrd@z Thu Jan 1 00:00:00 1970 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=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,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 BEA5FC43462 for ; Wed, 12 May 2021 16:42:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8AA5961285 for ; Wed, 12 May 2021 16:42:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239229AbhELQiz (ORCPT ); Wed, 12 May 2021 12:38:55 -0400 Received: from mail.kernel.org ([198.145.29.99]:47298 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236253AbhELQ22 (ORCPT ); Wed, 12 May 2021 12:28:28 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id D489261263; Wed, 12 May 2021 15:56:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1620834995; bh=xlLUq19/W7mJfH+7izPsFzsIiqBv7Nf50kslBfS5AGw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XdTWrb9nKxx/W0oWtgpHSKC+uBH6nStZvuDvFqnfxb3i4fPSJi/fftKL/iEKg5eDr 05paoiIE7auD1+Vbwy8dwNGSVjXNhxY1kZnp0dvmB5oV8JZx06huhkLzg4xODA8mtI OicuWXa/O0Ek2W/xVHUIuUrFuMJsyz+vdKvBduFg= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Hulk Robot , Wei Yongjun , Sasha Levin Subject: [PATCH 5.12 166/677] serial: liteuart: fix return value check in liteuart_probe() Date: Wed, 12 May 2021 16:43:32 +0200 Message-Id: <20210512144842.762763232@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210512144837.204217980@linuxfoundation.org> References: <20210512144837.204217980@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Wei Yongjun [ Upstream commit cebeddd6d0d9f839b9df2930b6a768b54913a763 ] In case of error, the function devm_platform_get_and_ioremap_resource() returns ERR_PTR() and never returns NULL. The NULL test in the return value check should be replaced with IS_ERR(). Fixes: 1da81e5562fa ("drivers/tty/serial: add LiteUART driver") Reported-by: Hulk Robot Signed-off-by: Wei Yongjun Link: https://lore.kernel.org/r/20210305034929.3234352-1-weiyongjun1@huawei.com Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/tty/serial/liteuart.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/tty/serial/liteuart.c b/drivers/tty/serial/liteuart.c index 64842f3539e1..0b06770642cb 100644 --- a/drivers/tty/serial/liteuart.c +++ b/drivers/tty/serial/liteuart.c @@ -270,8 +270,8 @@ static int liteuart_probe(struct platform_device *pdev) /* get membase */ port->membase = devm_platform_get_and_ioremap_resource(pdev, 0, NULL); - if (!port->membase) - return -ENXIO; + if (IS_ERR(port->membase)) + return PTR_ERR(port->membase); /* values not from device tree */ port->dev = &pdev->dev; -- 2.30.2