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Thu, 30 Jul 2020 23:02:07 +0000 From: Jonathan Bakker To: kyungmin.park@samsung.com, s.nawrocki@samsung.com, mchehab@kernel.org, kgene@kernel.org, krzk@kernel.org, linux-media@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org Cc: devicetree@vger.kernel.org, robh+dt@kernel.org, Jonathan Bakker Subject: [PATCH v2 10/11] media: exynos4-is: Handle duplicate calls to vidioc_streamoff Date: Thu, 30 Jul 2020 16:01:13 -0700 Message-ID: X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200730230114.8572-1-xc-racer2@live.ca> References: <20200730230114.8572-1-xc-racer2@live.ca> Content-Transfer-Encoding: 7BIT Content-Type: text/plain; charset=US-ASCII X-ClientProxiedBy: MWHPR07CA0002.namprd07.prod.outlook.com (2603:10b6:300:116::12) To BN6PR04MB0660.namprd04.prod.outlook.com (2603:10b6:404:d9::21) X-Microsoft-Original-Message-ID: <20200730230114.8572-11-xc-racer2@live.ca> MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from jon-hp-6570b.telus (2001:569:fb68:9c00:8067:f823:1e15:7520) by MWHPR07CA0002.namprd07.prod.outlook.com (2603:10b6:300:116::12) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3239.16 via Frontend Transport; Thu, 30 Jul 2020 23:02:04 +0000 X-Mailer: git-send-email 2.20.1 X-Microsoft-Original-Message-ID: <20200730230114.8572-11-xc-racer2@live.ca> X-TMN: [NVzrdjcbDFmjrKPwmClgs53y4e5yhvvtuJtIwpLttDdmQ4zC7eQVZCBy2GOMpqMx] X-MS-PublicTrafficType: Email X-IncomingHeaderCount: 49 X-EOPAttributedMessage: 0 X-MS-Office365-Filtering-Correlation-Id: 3dd7da9f-7c1c-4eac-443f-08d834dc94d0 X-MS-TrafficTypeDiagnostic: CO1NAM11HT018: X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 12XirX4/pP+7CFneqKLp/Sh3GB4hdD6DC02sAuR9TsRz+T1Rkx7315O38DTXxXaTDSicMoy9v31CTGXPz8NyqkoRP0U+pi+NANuwrsZvS0HYJo0/t40h/Wkz7wkSosqPJoI6CGs6m4FkyD6YATE2IS39zPKFSBssxaoP3koCbFjWDq/1K6p32iJIyIY4RtwDRLf8UVc+NRgoIFs7D9n1Iw== X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:0;SRV:;IPV:NLI;SFV:NSPM;H:BN6PR04MB0660.namprd04.prod.outlook.com;PTR:;CAT:NONE;SFTY:;SFS:;DIR:OUT;SFP:1901; X-MS-Exchange-AntiSpam-MessageData: W4whD87R1QqxYiP2vR0N6kdSkIFvPiVu+52/j1CdL3XOjqf9tNk6igGUUs1dstP5c54SMqihvF/0wn94dpn6fTZJieE53h3eiWNJZ2JTZhJjhgMwweBLmaMOctzW3bTY7cZ2OMHwUbYBzklWDS3I0t1iY4nyIN5fNrCza+BQIFCoWsB1rC+I4a8bcmlXpuj3gOXRu3fU+XRZ+t8F+1MO8g== X-OriginatorOrg: outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 3dd7da9f-7c1c-4eac-443f-08d834dc94d0 X-MS-Exchange-CrossTenant-OriginalArrivalTime: 30 Jul 2020 23:02:07.1959 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 84df9e7f-e9f6-40af-b435-aaaaaaaaaaaa X-MS-Exchange-CrossTenant-AuthSource: CO1NAM11FT027.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: Internet X-MS-Exchange-CrossTenant-RMS-PersistedConsumerOrg: 00000000-0000-0000-0000-000000000000 X-MS-Exchange-Transport-CrossTenantHeadersStamped: CO1NAM11HT018 Sender: linux-samsung-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org vidioc_streamoff can be called multiple times from userspace, but we should only call media_pipeline_stop when we're actually setup. This became more noticeable after commit 2a2599c66368 ("[media] media: entity: Catch unbalanced media_pipeline_stop calls") was merged as it added a WARN for unbalanced calls to media_pipeline_stop. Signed-off-by: Jonathan Bakker --- Changes from v1: - re-worded commit message for a better description of the problem --- drivers/media/platform/exynos4-is/fimc-capture.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/media/platform/exynos4-is/fimc-capture.c b/drivers/media/platform/exynos4-is/fimc-capture.c index e70785d8a809..887a736b2e0e 100644 --- a/drivers/media/platform/exynos4-is/fimc-capture.c +++ b/drivers/media/platform/exynos4-is/fimc-capture.c @@ -1232,8 +1232,11 @@ static int fimc_cap_streamoff(struct file *file, void *priv, if (ret < 0) return ret; - media_pipeline_stop(&vc->ve.vdev.entity); - vc->streaming = false; + if (vc->streaming) { + media_pipeline_stop(&vc->ve.vdev.entity); + vc->streaming = false; + } + return 0; } -- 2.20.1