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=-19.4 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=unavailable 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 687F9C18E7B for ; Wed, 12 May 2021 19:10:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 536F961352 for ; Wed, 12 May 2021 19:10:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1377572AbhELTHe (ORCPT ); Wed, 12 May 2021 15:07:34 -0400 Received: from mail.kernel.org ([198.145.29.99]:33470 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232339AbhELQnC (ORCPT ); Wed, 12 May 2021 12:43:02 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id AE26261E5C; Wed, 12 May 2021 16:12:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1620835972; bh=fU/4kerB8Rqj+WMxsvLlAsgQQomxfRsmta0+ohO1Heg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=D+3C153bO97i5B9E4F5zRYVuxZKOqCGlIWusZj0BhnGrZccYC/jN0EVrmHnL0R069 HyqQJ927jjRKSMFvFnjWnRlKinep5UfOGIrCkV68bp5RlcP1ykZu3nNNaON8toxAMg 9XAEsmBimwvpM2nGJgq2ZZcoivJCzCQfiVJsp/DM= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Hulk Robot , Qinglang Miao , Wolfram Sang , Sasha Levin Subject: [PATCH 5.12 557/677] i2c: img-scb: fix reference leak when pm_runtime_get_sync fails Date: Wed, 12 May 2021 16:50:03 +0200 Message-Id: <20210512144855.895749768@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210512144837.204217980@linuxfoundation.org> References: <20210512144837.204217980@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Qinglang Miao [ Upstream commit 223125e37af8a641ea4a09747a6a52172fc4b903 ] The PM reference count is not expected to be incremented on return in functions img_i2c_xfer and img_i2c_init. However, pm_runtime_get_sync will increment the PM reference count even failed. Forgetting to putting operation will result in a reference leak here. Replace it with pm_runtime_resume_and_get to keep usage counter balanced. Fixes: 93222bd9b966 ("i2c: img-scb: Add runtime PM") Reported-by: Hulk Robot Signed-off-by: Qinglang Miao Signed-off-by: Wolfram Sang Signed-off-by: Sasha Levin --- 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; -- 2.30.2