From patchwork Fri Nov 27 09:44:37 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qinglang Miao X-Patchwork-Id: 11935387 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 A8A11C2D0E4 for ; Fri, 27 Nov 2020 10:11:45 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 3B50E20674 for ; Fri, 27 Nov 2020 10:11:45 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3B50E20674 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id D11A96EB81; Fri, 27 Nov 2020 10:11:38 +0000 (UTC) Received: from szxga05-in.huawei.com (szxga05-in.huawei.com [45.249.212.191]) by gabe.freedesktop.org (Postfix) with ESMTPS id CD5426EB75 for ; Fri, 27 Nov 2020 09:40:31 +0000 (UTC) Received: from DGGEMS411-HUB.china.huawei.com (unknown [172.30.72.60]) by szxga05-in.huawei.com (SkyGuard) with ESMTP id 4Cj8js0sJNzLt3L; Fri, 27 Nov 2020 17:40:01 +0800 (CST) Received: from localhost.localdomain.localdomain (10.175.113.25) by DGGEMS411-HUB.china.huawei.com (10.3.19.211) with Microsoft SMTP Server id 14.3.487.0; Fri, 27 Nov 2020 17:40:21 +0800 From: Qinglang Miao To: Andrzej Hajda , Neil Armstrong , Laurent Pinchart , Jonas Karlman , "Jernej Skrabec" , David Airlie , "Daniel Vetter" Subject: [PATCH] drm: bridge: cdns-mhdp8546: fix reference leak in cdns_mhdp_probe Date: Fri, 27 Nov 2020 17:44:37 +0800 Message-ID: <20201127094437.120952-1-miaoqinglang@huawei.com> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 X-Originating-IP: [10.175.113.25] X-CFilter-Loop: Reflected X-Mailman-Approved-At: Fri, 27 Nov 2020 10:11:27 +0000 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Qinglang Miao , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" pm_runtime_get_sync will increment pm usage counter even it failed. Forgetting to putting operation will result in a reference leak here. A new function pm_runtime_resume_and_get is introduced in [0] to keep usage counter balanced. So We fix the reference leak by replacing it with new funtion. [0] dd8088d5a896 ("PM: runtime: Add pm_runtime_resume_and_get to deal with usage counter") Fixes: fb43aa0acdfd ("drm: bridge: Add support for Cadence MHDP8546 DPI/DP bridge") Reported-by: Hulk Robot Signed-off-by: Qinglang Miao --- drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c index d0c65610e..3ee515d21 100644 --- a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c +++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c @@ -2369,7 +2369,7 @@ static int cdns_mhdp_probe(struct platform_device *pdev) clk_prepare_enable(clk); pm_runtime_enable(dev); - ret = pm_runtime_get_sync(dev); + ret = pm_runtime_resume_and_get(dev); if (ret < 0) { dev_err(dev, "pm_runtime_get_sync failed\n"); pm_runtime_disable(dev);