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=-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,URIBL_BLOCKED,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 9CD81C4708F for ; Mon, 31 May 2021 06:17:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 70DFF6124B for ; Mon, 31 May 2021 06:17:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230032AbhEaGTJ (ORCPT ); Mon, 31 May 2021 02:19:09 -0400 Received: from szxga01-in.huawei.com ([45.249.212.187]:6088 "EHLO szxga01-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229752AbhEaGTJ (ORCPT ); Mon, 31 May 2021 02:19:09 -0400 Received: from dggemv704-chm.china.huawei.com (unknown [172.30.72.55]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4FtlPd4MgqzYmhs; Mon, 31 May 2021 14:14:45 +0800 (CST) Received: from dggemi762-chm.china.huawei.com (10.1.198.148) by dggemv704-chm.china.huawei.com (10.3.19.47) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256) id 15.1.2176.2; Mon, 31 May 2021 14:17:23 +0800 Received: from linux-lmwb.huawei.com (10.175.103.112) by dggemi762-chm.china.huawei.com (10.1.198.148) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2176.2; Mon, 31 May 2021 14:17:22 +0800 From: Zou Wei To: , , , , , CC: , , Zou Wei Subject: [PATCH -next] dmaengine: rcar-dmac: Fix PM reference leak in rcar_dmac_probe() Date: Mon, 31 May 2021 14:36:03 +0800 Message-ID: <1622442963-54095-1-git-send-email-zou_wei@huawei.com> X-Mailer: git-send-email 2.6.2 MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.175.103.112] X-ClientProxiedBy: dggems704-chm.china.huawei.com (10.3.19.181) To dggemi762-chm.china.huawei.com (10.1.198.148) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: dmaengine@vger.kernel.org pm_runtime_get_sync will increment pm usage counter even it failed. Forgetting to putting operation will result in reference leak here. Fix it by replacing it with pm_runtime_resume_and_get to keep usage counter balanced. Reported-by: Hulk Robot Signed-off-by: Zou Wei --- drivers/dma/sh/rcar-dmac.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/dma/sh/rcar-dmac.c b/drivers/dma/sh/rcar-dmac.c index d530c1b..6885b3d 100644 --- a/drivers/dma/sh/rcar-dmac.c +++ b/drivers/dma/sh/rcar-dmac.c @@ -1913,7 +1913,7 @@ static int rcar_dmac_probe(struct platform_device *pdev) /* Enable runtime PM and initialize the device. */ pm_runtime_enable(&pdev->dev); - ret = pm_runtime_get_sync(&pdev->dev); + ret = pm_runtime_resume_and_get(&pdev->dev); if (ret < 0) { dev_err(&pdev->dev, "runtime PM get sync failed (%d)\n", ret); return ret; -- 2.6.2