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=-18.8 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 D3B25C433E0 for ; Mon, 1 Mar 2021 17:26:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9406C6500B for ; Mon, 1 Mar 2021 17:26:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238393AbhCARZ6 (ORCPT ); Mon, 1 Mar 2021 12:25:58 -0500 Received: from mail.kernel.org ([198.145.29.99]:37356 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238000AbhCARVT (ORCPT ); Mon, 1 Mar 2021 12:21:19 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 5736B65069; Mon, 1 Mar 2021 16:48:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1614617300; bh=b/INvTkZ1GG3fLwl6/UxsJPlcQxRl0AY/NIWi+CBkks=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=WdjcVf2OWx2ouKEnp4hTKiDraBW5gUMO1tmFRkBXA2ppSSjCB2OkWVE3DFg9Oip/o Mv/61e9qhIk9gPxWcYwn0VR02tc+rZWnWMAH6mh+2qODmbocBY3Lbb1crdUMKRI1o9 vj+0b9bWapudEqxGCsNB/F6JWwWwSqEuBALVswZk= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Zhang Qilong , Krzysztof Kozlowski , Sasha Levin Subject: [PATCH 5.4 025/340] memory: mtk-smi: Fix PM usage counter unbalance in mtk_smi ops Date: Mon, 1 Mar 2021 17:09:29 +0100 Message-Id: <20210301161049.561996111@linuxfoundation.org> X-Mailer: git-send-email 2.30.1 In-Reply-To: <20210301161048.294656001@linuxfoundation.org> References: <20210301161048.294656001@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: Zhang Qilong [ Upstream commit a2d522ff0f5cc26915c4ccee9457fd4b4e1edc48 ] 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: 4f0a1a1ae3519 ("memory: mtk-smi: Invoke pm runtime_callback to enable clocks") Signed-off-by: Zhang Qilong Link: https://lore.kernel.org/r/20201123102118.3866195-1-zhangqilong3@huawei.com Signed-off-by: Krzysztof Kozlowski Signed-off-by: Sasha Levin --- drivers/memory/mtk-smi.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/memory/mtk-smi.c b/drivers/memory/mtk-smi.c index a113e811faabe..da1ce7fd4cf5c 100644 --- a/drivers/memory/mtk-smi.c +++ b/drivers/memory/mtk-smi.c @@ -127,7 +127,7 @@ static void mtk_smi_clk_disable(const struct mtk_smi *smi) int mtk_smi_larb_get(struct device *larbdev) { - int ret = pm_runtime_get_sync(larbdev); + int ret = pm_runtime_resume_and_get(larbdev); return (ret < 0) ? ret : 0; } @@ -336,7 +336,7 @@ static int __maybe_unused mtk_smi_larb_resume(struct device *dev) int ret; /* Power on smi-common. */ - ret = pm_runtime_get_sync(larb->smi_common_dev); + ret = pm_runtime_resume_and_get(larb->smi_common_dev); if (ret < 0) { dev_err(dev, "Failed to pm get for smi-common(%d).\n", ret); return ret; -- 2.27.0