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Wed, 7 Mar 2018 23:57:44 -0500 Received: from mail-bn3nam01on0119.outbound.protection.outlook.com ([104.47.33.119]:51237 "EHLO NAM01-BN3-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S935068AbeCHE51 (ORCPT ); Wed, 7 Mar 2018 23:57:27 -0500 From: Sasha Levin To: "linux-kernel@vger.kernel.org" , "stable@vger.kernel.org" CC: Peter Ujfalusi , Tomi Valkeinen , Sasha Levin Subject: [PATCH AUTOSEL for 4.15 50/78] drm/omap: DMM: Check for DMM readiness after successful transaction commit Thread-Topic: [PATCH AUTOSEL for 4.15 50/78] drm/omap: DMM: Check for DMM readiness after successful transaction commit Thread-Index: AQHTtpnOgw/BpTksT0Cw02egVJiDkw== Date: Thu, 8 Mar 2018 04:56:23 +0000 Message-ID: <20180308045525.7662-50-alexander.levin@microsoft.com> References: <20180308045525.7662-1-alexander.levin@microsoft.com> In-Reply-To: <20180308045525.7662-1-alexander.levin@microsoft.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [52.168.54.252] x-ms-publictraffictype: Email x-microsoft-exchange-diagnostics: 1;DM5PR2101MB1079;7:6UTOavEyJosnDMykc7AsnGzEcYQUsYZXKRvLWV9YokFbW3qRT4mHdAd01GqguCBD6jMW4TuMICB9tBjomYuuW7oI45N3q8ZnCtjhZ5n2K5oG8ldsM2d5O3qtdCpKSNXp/SHz1iMBPQEnWt/jVwS1CouyhGFEU00Ewi6ysQQgzN8BX1PZpMtkbv5RZBiYkXhUIzc+jdIOluZPZY5rHPwnk0SHJ/nM3lHv2s9Cr//Ekf3NwKNWO1HV01H3mORWw16z;20:3w8QiI4FNFHG4LQLUvYXBZCJan2vj1fauKcKA4gqbEL6DUwMvKxmWAqPSG5dthDYAAbdL4cuPWjY475vzIQEFsmjtC8sb5rq14xw8HNcH3r+O2TRxCd9EgvivN8VnoysJphTCeUC9RFT1ltTZwKiJRHkjbfg5H0IXo+2c3Hr00g= x-ms-office365-filtering-ht: Tenant x-ms-office365-filtering-correlation-id: bea406a1-02b6-405a-b6b1-08d584b10e65 x-microsoft-antispam: UriScan:;BCL:0;PCL:0;RULEID:(7020095)(4652020)(48565401081)(5600026)(4604075)(3008032)(4534165)(4627221)(201703031133081)(201702281549075)(2017052603328)(7193020);SRVR:DM5PR2101MB1079; 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x-microsoft-antispam-message-info: 2HedMEO3affbwpr/IioqGJertc+Y8slwsk0YvUdjDoJRnOx7XXo+w7sNE7gDd7Q3pxEkaulxJQHF31v5VHFq8rUeROLMlDet3XkpjX06nYEyS85Uxnrr5/1CYcEtE39o9rQiK2W53bmBPpG4ilut/5bF7tTRcCg5l8PYZyudITawKw+UMt8RVBXmhhaZSSG80Dt7AOc6D9vCsH8F8uVfw82JbQ+QpU/uwYR4SbJ280v6t0ENk7VJipjwAenYKsjAyopsnHa0ONmv9SVsf4ezjrb+bBwY7T0j81+qnPjdq305PHoMoriYHtwL8gbBAhgsKV9dA5sme3Z3CzukoPpmVw== spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: microsoft.com X-MS-Exchange-CrossTenant-Network-Message-Id: bea406a1-02b6-405a-b6b1-08d584b10e65 X-MS-Exchange-CrossTenant-originalarrivaltime: 08 Mar 2018 04:56:23.5453 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47 X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM5PR2101MB1079 Sender: stable-owner@vger.kernel.org X-Mailing-List: stable@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: From: Peter Ujfalusi [ Upstream commit b7ea6b286c4051e043f691781785e3c4672f014a ] Check the status of the DMM engine after it is reported that the transaction was completed as in rare cases the engine might not reached a working state. The wait_status() will print information in case the DMM is not reached the expected state and the dmm_txn_commit() will return with an error code to make sure that we are not continuing with a broken setup. Signed-off-by: Peter Ujfalusi Signed-off-by: Tomi Valkeinen Signed-off-by: Sasha Levin --- drivers/gpu/drm/omapdrm/omap_dmm_tiler.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/gpu/drm/omapdrm/omap_dmm_tiler.c b/drivers/gpu/drm/oma= pdrm/omap_dmm_tiler.c index c60a85e82c6d..fd05f7e9f43f 100644 --- a/drivers/gpu/drm/omapdrm/omap_dmm_tiler.c +++ b/drivers/gpu/drm/omapdrm/omap_dmm_tiler.c @@ -298,7 +298,12 @@ static int dmm_txn_commit(struct dmm_txn *txn, bool wa= it) msecs_to_jiffies(100))) { dev_err(dmm->dev, "timed out waiting for done\n"); ret =3D -ETIMEDOUT; + goto cleanup; } + + /* Check the engine status before continue */ + ret =3D wait_status(engine, DMM_PATSTATUS_READY | + DMM_PATSTATUS_VALID | DMM_PATSTATUS_DONE); } =20 cleanup: --=20 2.14.1