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,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 0E467C47082 for ; Mon, 7 Jun 2021 06:32:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CAD836121D for ; Mon, 7 Jun 2021 06:32:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230175AbhFGGeg (ORCPT ); Mon, 7 Jun 2021 02:34:36 -0400 Received: from szxga08-in.huawei.com ([45.249.212.255]:4332 "EHLO szxga08-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229436AbhFGGef (ORCPT ); Mon, 7 Jun 2021 02:34:35 -0400 Received: from dggemv711-chm.china.huawei.com (unknown [172.30.72.54]) by szxga08-in.huawei.com (SkyGuard) with ESMTP id 4Fz3MZ1zwdz1BJmb; Mon, 7 Jun 2021 14:27:54 +0800 (CST) Received: from dggema755-chm.china.huawei.com (10.1.198.197) by dggemv711-chm.china.huawei.com (10.1.198.66) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256) id 15.1.2176.2; Mon, 7 Jun 2021 14:32:43 +0800 Received: from huawei.com (10.90.53.225) by dggema755-chm.china.huawei.com (10.1.198.197) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2176.2; Mon, 7 Jun 2021 14:32:43 +0800 From: Zhang Qilong To: , , , CC: , , , Subject: [PATCH -next 1/3] dmaengine: stm32-dma: Fix PM usage counter imbalance in stm32 dma ops Date: Mon, 7 Jun 2021 14:46:38 +0800 Message-ID: <20210607064640.121394-2-zhangqilong3@huawei.com> X-Mailer: git-send-email 2.26.0.106.g9fadedd In-Reply-To: <20210607064640.121394-1-zhangqilong3@huawei.com> References: <20210607064640.121394-1-zhangqilong3@huawei.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7BIT Content-Type: text/plain; charset=US-ASCII X-Originating-IP: [10.90.53.225] X-ClientProxiedBy: dggems705-chm.china.huawei.com (10.3.19.182) To dggema755-chm.china.huawei.com (10.1.198.197) 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. We fix it by replacing it with pm_runtime_resume_and_get to keep usage counter balanced. Fixes: 48bc73ba14bcd ("dmaengine: stm32-dma: Add PM Runtime support") Fixes: 05f8740a0e6fc ("dmaengine: stm32-dma: add suspend/resume power management support") Signed-off-by: Zhang Qilong --- drivers/dma/stm32-dma.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/dma/stm32-dma.c b/drivers/dma/stm32-dma.c index f54ecb123a52..7dd1d3d0bf06 100644 --- a/drivers/dma/stm32-dma.c +++ b/drivers/dma/stm32-dma.c @@ -1200,7 +1200,7 @@ static int stm32_dma_alloc_chan_resources(struct dma_chan *c) chan->config_init = false; - ret = pm_runtime_get_sync(dmadev->ddev.dev); + ret = pm_runtime_resume_and_get(dmadev->ddev.dev); if (ret < 0) return ret; @@ -1470,7 +1470,7 @@ static int stm32_dma_suspend(struct device *dev) struct stm32_dma_device *dmadev = dev_get_drvdata(dev); int id, ret, scr; - ret = pm_runtime_get_sync(dev); + ret = pm_runtime_resume_and_get(dev); if (ret < 0) return ret; -- 2.31.1