From patchwork Thu Apr 8 11:24:48 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pu Lehui X-Patchwork-Id: 418443 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=-16.7 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 AE94DC433ED for ; Thu, 8 Apr 2021 11:24:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7A7E76113C for ; Thu, 8 Apr 2021 11:24:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230411AbhDHLZG (ORCPT ); Thu, 8 Apr 2021 07:25:06 -0400 Received: from szxga05-in.huawei.com ([45.249.212.191]:15972 "EHLO szxga05-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229964AbhDHLZE (ORCPT ); Thu, 8 Apr 2021 07:25:04 -0400 Received: from DGGEMS414-HUB.china.huawei.com (unknown [172.30.72.59]) by szxga05-in.huawei.com (SkyGuard) with ESMTP id 4FGJlN63q1zrdJ2; Thu, 8 Apr 2021 19:22:40 +0800 (CST) Received: from ubuntu1804.huawei.com (10.67.174.98) by DGGEMS414-HUB.china.huawei.com (10.3.19.214) with Microsoft SMTP Server id 14.3.498.0; Thu, 8 Apr 2021 19:24:43 +0800 From: Pu Lehui To: CC: , , , , , Subject: [PATCH -next] i2c: img-scb: fix PM reference leak in img_i2c_xfer() Date: Thu, 8 Apr 2021 19:24:48 +0800 Message-ID: <20210408112448.211380-1-pulehui@huawei.com> X-Mailer: git-send-email 2.17.1 MIME-Version: 1.0 X-Originating-IP: [10.67.174.98] 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. Signed-off-by: Pu Lehui --- drivers/i2c/busses/i2c-img-scb.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/i2c/busses/i2c-img-scb.c b/drivers/i2c/busses/i2c-img-scb.c index 98a89301ed2a..8e987945ed45 100644 --- a/drivers/i2c/busses/i2c-img-scb.c +++ b/drivers/i2c/busses/i2c-img-scb.c @@ -1057,7 +1057,7 @@ static int img_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs, atomic = true; } - ret = pm_runtime_get_sync(adap->dev.parent); + ret = pm_runtime_resume_and_get(adap->dev.parent); if (ret < 0) return ret; @@ -1158,7 +1158,7 @@ static int img_i2c_init(struct img_i2c *i2c) u32 rev; int ret; - ret = pm_runtime_get_sync(i2c->adap.dev.parent); + ret = pm_runtime_resume_and_get(i2c->adap.dev.parent); if (ret < 0) return ret;