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=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 2307CC2B9F8 for ; Wed, 12 May 2021 17:05:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D63E961221 for ; Wed, 12 May 2021 17:05:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240945AbhELRFN (ORCPT ); Wed, 12 May 2021 13:05:13 -0400 Received: from mail.kernel.org ([198.145.29.99]:33484 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237867AbhELQnN (ORCPT ); Wed, 12 May 2021 12:43:13 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id BD69961E5E; Wed, 12 May 2021 16:13:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1620836002; bh=qcijQx95h+lRm0cz4YZ4JFo08J43H8yQ6iqo2AaYK0k=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=URD4sp37fIXSdigC2mQudNi4OY2F14a0qeW4RVD+gfjko4GuFa/tbNPtr7l2fGnM0 4vvaBuXGMrNna14K4TXM2snS2i3s8wBFXIQ1nAW72+A1d2bISpDOGDH3PgJoxE96SE duMsTjiIqor90cBNKxNebZxnH5ETyXgT3k3SWkUU= 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 5.12 563/677] i2c: xiic: fix reference leak when pm_runtime_get_sync fails Date: Wed, 12 May 2021 16:50:09 +0200 Message-Id: <20210512144856.102595421@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: stable@vger.kernel.org From: Qinglang Miao [ Upstream commit a85c5c7a3aa8041777ff691400b4046e56149fd3 ] The PM reference count is not expected to be incremented on return in xiic_xfer and xiic_i2c_remove. 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: 10b17004a74c ("i2c: xiic: Fix the clocking across bind unbind") Reported-by: Hulk Robot Signed-off-by: Qinglang Miao Signed-off-by: Wolfram Sang Signed-off-by: Sasha Levin --- drivers/i2c/busses/i2c-xiic.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/i2c/busses/i2c-xiic.c b/drivers/i2c/busses/i2c-xiic.c index 087b2951942e..2a8568b97c14 100644 --- a/drivers/i2c/busses/i2c-xiic.c +++ b/drivers/i2c/busses/i2c-xiic.c @@ -706,7 +706,7 @@ static int xiic_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num) dev_dbg(adap->dev.parent, "%s entry SR: 0x%x\n", __func__, xiic_getreg8(i2c, XIIC_SR_REG_OFFSET)); - err = pm_runtime_get_sync(i2c->dev); + err = pm_runtime_resume_and_get(i2c->dev); if (err < 0) return err; @@ -873,7 +873,7 @@ static int xiic_i2c_remove(struct platform_device *pdev) /* remove adapter & data */ i2c_del_adapter(&i2c->adap); - ret = pm_runtime_get_sync(i2c->dev); + ret = pm_runtime_resume_and_get(i2c->dev); if (ret < 0) return ret; -- 2.30.2