From patchwork Wed Apr 28 14:51:35 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mauro Carvalho Chehab X-Patchwork-Id: 12229035 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=-16.8 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,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 505A9C433ED for ; Wed, 28 Apr 2021 14:54:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1905761151 for ; Wed, 28 Apr 2021 14:54:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240377AbhD1Oxq (ORCPT ); Wed, 28 Apr 2021 10:53:46 -0400 Received: from mail.kernel.org ([198.145.29.99]:36314 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240280AbhD1Oxa (ORCPT ); Wed, 28 Apr 2021 10:53:30 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id DBB7461457; Wed, 28 Apr 2021 14:52:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1619621564; bh=v3oOn6uPHJX4lDQc2LG+Rn/44BbALYGNkVgzHn1PdbQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=WVDkAANun4gFfpVw9Hv5Wz/ja0emkiANxg61djJctBzJFVDY62PIlfXf0HOo2EPnP Tbmzawo8Xlqbrpq/N4j/l2uevJu4o+vs4fMksYUZPxEK/A6xdDkaIoi7RDTQeAdzam l3Pb5zZuFBp4DWgLQu2YHtI2XpL0GTA83N7Cwe4AOJn1BVCC2IaVBClCL3U/vdVGSb Dqgx5B3M8Kcx67zmROjRnkfuj+7TNssEK/jBP/eyT/3hj5BmvNdNUDsUVKBayIzZU4 u6bSPzcM2DLYL/Nzgt49QqbL/ZDJ4wIDLJcwq1YoTe3C3BQbC3+AO492SDwbQUH22u 7SYO0KcUY0+mQ== Received: by mail.kernel.org with local (Exim 4.94) (envelope-from ) id 1lblYP-001DqG-VD; Wed, 28 Apr 2021 16:52:41 +0200 From: Mauro Carvalho Chehab Cc: linuxarm@huawei.com, mauro.chehab@huawei.com, Mauro Carvalho Chehab , "Lad, Prabhakar" , Mauro Carvalho Chehab , linux-kernel@vger.kernel.org, linux-media@vger.kernel.org Subject: [PATCH v4 14/79] media: am437x: fix pm_runtime_get_sync() usage count Date: Wed, 28 Apr 2021 16:51:35 +0200 Message-Id: <13b31912c93b56426660106d673d3c1a5be63170.1619621413.git.mchehab+huawei@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: References: MIME-Version: 1.0 Sender: Mauro Carvalho Chehab To: unlisted-recipients:; (no To-header on input) Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org The pm_runtime_get_sync() internally increments the dev->power.usage_count without decrementing it, even on errors. Replace it by the new pm_runtime_resume_and_get(), introduced by: commit dd8088d5a896 ("PM: runtime: Add pm_runtime_resume_and_get to deal with usage counter") in order to properly decrement the usage counter and avoid memory leaks. While here, ensure that the driver will check if PM runtime resumed at vpfe_initialize_device(). Signed-off-by: Mauro Carvalho Chehab --- drivers/media/platform/am437x/am437x-vpfe.c | 22 +++++++++++++++------ 1 file changed, 16 insertions(+), 6 deletions(-) diff --git a/drivers/media/platform/am437x/am437x-vpfe.c b/drivers/media/platform/am437x/am437x-vpfe.c index 6cdc77dda0e4..bced526f30f2 100644 --- a/drivers/media/platform/am437x/am437x-vpfe.c +++ b/drivers/media/platform/am437x/am437x-vpfe.c @@ -1021,7 +1021,9 @@ static int vpfe_initialize_device(struct vpfe_device *vpfe) if (ret) return ret; - pm_runtime_get_sync(vpfe->pdev); + ret = pm_runtime_resume_and_get(vpfe->pdev); + if (ret < 0) + return ret; vpfe_config_enable(&vpfe->ccdc, 1); @@ -2443,7 +2445,11 @@ static int vpfe_probe(struct platform_device *pdev) pm_runtime_enable(&pdev->dev); /* for now just enable it here instead of waiting for the open */ - pm_runtime_get_sync(&pdev->dev); + ret = pm_runtime_resume_and_get(&pdev->dev); + if (ret < 0) { + vpfe_err(vpfe, "Unable to resume device.\n"); + goto probe_out_v4l2_unregister; + } vpfe_ccdc_config_defaults(ccdc); @@ -2527,10 +2533,11 @@ static int vpfe_suspend(struct device *dev) { struct vpfe_device *vpfe = dev_get_drvdata(dev); struct vpfe_ccdc *ccdc = &vpfe->ccdc; + int ret; /* only do full suspend if streaming has started */ if (vb2_start_streaming_called(&vpfe->buffer_queue)) { - pm_runtime_get_sync(dev); + ret = pm_runtime_resume_and_get(dev); vpfe_config_enable(ccdc, 1); /* Save VPFE context */ @@ -2541,7 +2548,8 @@ static int vpfe_suspend(struct device *dev) vpfe_config_enable(ccdc, 0); /* Disable both master and slave clock */ - pm_runtime_put_sync(dev); + if (ret >= 0) + pm_runtime_put_sync(dev); } /* Select sleep pin state */ @@ -2583,18 +2591,20 @@ static int vpfe_resume(struct device *dev) { struct vpfe_device *vpfe = dev_get_drvdata(dev); struct vpfe_ccdc *ccdc = &vpfe->ccdc; + int ret; /* only do full resume if streaming has started */ if (vb2_start_streaming_called(&vpfe->buffer_queue)) { /* Enable both master and slave clock */ - pm_runtime_get_sync(dev); + ret = pm_runtime_resume_and_get(dev); vpfe_config_enable(ccdc, 1); /* Restore VPFE context */ vpfe_restore_context(ccdc); vpfe_config_enable(ccdc, 0); - pm_runtime_put_sync(dev); + if (ret >= 0) + pm_runtime_put_sync(dev); } /* Select default pin state */