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=-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=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 D3AB9C43462 for ; Tue, 27 Apr 2021 10:29:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B2643611C1 for ; Tue, 27 Apr 2021 10:29:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235609AbhD0K3p (ORCPT ); Tue, 27 Apr 2021 06:29:45 -0400 Received: from mail.kernel.org ([198.145.29.99]:48146 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238099AbhD0K2m (ORCPT ); Tue, 27 Apr 2021 06:28:42 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 0383361481; Tue, 27 Apr 2021 10:27:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1619519237; bh=v3oOn6uPHJX4lDQc2LG+Rn/44BbALYGNkVgzHn1PdbQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=JEckz/fuxi4Yvs858mBbDa/aqLRqDtn9bj58CCmGAwK+QlqI37NtGR/Y+J/OXjsBP PNc65TsKhuzdT/yReKJQSOyQBpdMzZ3HgVk459MlonuhUKxN06+tIgvNT9Jaz3QfE/ trGOaUWCkBkAAj8suBC9dpgUQjA3PnqAsf9lWiAqueppxgWDLid18DETKQP8NS5sUJ vX1DuVJFZrSRH+Pnwv+Ne0PkrDqGtAXPQHQRPQtlzPUbAiiFx4ilBStNbtSSQrgyhW /Sio56g1+Bv5UGnVUQL38bXFwNA+Ws2vC8338NGikS7/6p8sHMdeRjAOuJjko4MMG1 pbDKV4IBvXrOg== Received: by mail.kernel.org with local (Exim 4.94) (envelope-from ) id 1lbKvv-000nzt-JM; Tue, 27 Apr 2021 12:27:11 +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 v3 14/79] media: am437x: fix pm_runtime_get_sync() usage count Date: Tue, 27 Apr 2021 12:26:04 +0200 Message-Id: <657bba55e6afbb321b0f0c612d0b8f900e365594.1619519080.git.mchehab+huawei@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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 */ -- 2.30.2