From patchwork Thu Apr 8 12:59:15 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Li Huafei X-Patchwork-Id: 417736 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 E68F8C43462 for ; Thu, 8 Apr 2021 12:59:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AD60C6113B for ; Thu, 8 Apr 2021 12:59:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231563AbhDHM7i (ORCPT ); Thu, 8 Apr 2021 08:59:38 -0400 Received: from szxga05-in.huawei.com ([45.249.212.191]:16050 "EHLO szxga05-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231451AbhDHM7f (ORCPT ); Thu, 8 Apr 2021 08:59:35 -0400 Received: from DGGEMS405-HUB.china.huawei.com (unknown [172.30.72.60]) by szxga05-in.huawei.com (SkyGuard) with ESMTP id 4FGLqj71yTzPnhZ; Thu, 8 Apr 2021 20:56:33 +0800 (CST) Received: from ubuntu1804.huawei.com (10.67.174.174) by DGGEMS405-HUB.china.huawei.com (10.3.19.205) with Microsoft SMTP Server id 14.3.498.0; Thu, 8 Apr 2021 20:59:10 +0800 From: Li Huafei To: , , , , , CC: , , , , <--lihuafei1@huawei.com> Subject: [PATCH -next] i2c: sprd: Fix PM reference leak in sprd_i2c_master_xfer() Date: Thu, 8 Apr 2021 20:59:15 +0800 Message-ID: <20210408125915.137089-1-lihuafei1@huawei.com> X-Mailer: git-send-email 2.17.1 MIME-Version: 1.0 X-Originating-IP: [10.67.174.174] X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-i2c@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: Li Huafei --- drivers/i2c/busses/i2c-sprd.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/i2c/busses/i2c-sprd.c b/drivers/i2c/busses/i2c-sprd.c index 2917fecf6c80..8ead7e021008 100644 --- a/drivers/i2c/busses/i2c-sprd.c +++ b/drivers/i2c/busses/i2c-sprd.c @@ -290,7 +290,7 @@ static int sprd_i2c_master_xfer(struct i2c_adapter *i2c_adap, struct sprd_i2c *i2c_dev = i2c_adap->algo_data; int im, ret; - ret = pm_runtime_get_sync(i2c_dev->dev); + ret = pm_runtime_resume_and_get(i2c_dev->dev); if (ret < 0) return ret; @@ -576,7 +576,7 @@ static int sprd_i2c_remove(struct platform_device *pdev) struct sprd_i2c *i2c_dev = platform_get_drvdata(pdev); int ret; - ret = pm_runtime_get_sync(i2c_dev->dev); + ret = pm_runtime_resume_and_get(i2c_dev->dev); if (ret < 0) return ret;