From patchwork Thu Sep 16 16:00:09 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "gregkh@linuxfoundation.org" X-Patchwork-Id: 513679 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=-19.1 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 782D6C433F5 for ; Thu, 16 Sep 2021 17:30:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6089061360 for ; Thu, 16 Sep 2021 17:30:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1347346AbhIPRbR (ORCPT ); Thu, 16 Sep 2021 13:31:17 -0400 Received: from mail.kernel.org ([198.145.29.99]:47078 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1352832AbhIPR25 (ORCPT ); Thu, 16 Sep 2021 13:28:57 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 61E3961CF1; Thu, 16 Sep 2021 16:46:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1631810767; bh=Mgk6zcJV3cp/1FnKDc4HTUGsqHEyT0cD/bodCBNyz7k=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=NZzVEtp3zxV9HF37hYZ3icSweVdfIzZvjdhuRc2d0MG3tet2fNDz7qcOkzjcyAYTq sPddF7DOQSWxBjd/alsx04e/R3hStLo1TeRYOIItSy60HZtx43+xhDyRTHYZjcCMIh CkRA4TnHzJzZ9HR3k8uCKzt/Rb44G3qe6Grjgzrs= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Evgeny Novikov , Hans Verkuil , Mauro Carvalho Chehab , Sasha Levin Subject: [PATCH 5.14 260/432] media: tegra-cec: Handle errors of clk_prepare_enable() Date: Thu, 16 Sep 2021 18:00:09 +0200 Message-Id: <20210916155819.636415957@linuxfoundation.org> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20210916155810.813340753@linuxfoundation.org> References: <20210916155810.813340753@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Evgeny Novikov [ Upstream commit 38367073c796a37a61549b1f66a71b3adb03802d ] tegra_cec_probe() and tegra_cec_resume() ignored possible errors of clk_prepare_enable(). The patch fixes this. Found by Linux Driver Verification project (linuxtesting.org). Signed-off-by: Evgeny Novikov Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Sasha Levin --- drivers/media/cec/platform/tegra/tegra_cec.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/drivers/media/cec/platform/tegra/tegra_cec.c b/drivers/media/cec/platform/tegra/tegra_cec.c index 1ac0c70a5981..5e907395ca2e 100644 --- a/drivers/media/cec/platform/tegra/tegra_cec.c +++ b/drivers/media/cec/platform/tegra/tegra_cec.c @@ -366,7 +366,11 @@ static int tegra_cec_probe(struct platform_device *pdev) return -ENOENT; } - clk_prepare_enable(cec->clk); + ret = clk_prepare_enable(cec->clk); + if (ret) { + dev_err(&pdev->dev, "Unable to prepare clock for CEC\n"); + return ret; + } /* set context info. */ cec->dev = &pdev->dev; @@ -446,9 +450,7 @@ static int tegra_cec_resume(struct platform_device *pdev) dev_notice(&pdev->dev, "Resuming\n"); - clk_prepare_enable(cec->clk); - - return 0; + return clk_prepare_enable(cec->clk); } #endif