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Thu, 8 Mar 2018 00:04:30 -0500 Received: from mail-co1nam03on0139.outbound.protection.outlook.com ([104.47.40.139]:39791 "EHLO NAM03-CO1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S935433AbeCHFE2 (ORCPT ); Thu, 8 Mar 2018 00:04:28 -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 4.9 177/190] drm/omap: DMM: Check for DMM readiness after successful transaction commit Thread-Topic: [PATCH AUTOSEL for 4.9 177/190] drm/omap: DMM: Check for DMM readiness after successful transaction commit Thread-Index: AQHTtppWXdMjmt0DJUyzCrfWbkZNBg== Date: Thu, 8 Mar 2018 05:00:10 +0000 Message-ID: <20180308045810.8041-177-alexander.levin@microsoft.com> References: <20180308045810.8041-1-alexander.levin@microsoft.com> In-Reply-To: <20180308045810.8041-1-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;DM5PR2101MB0919;7:X1S+pzHeOBo9HiepvQEipJ7x0SXVEEdgFgNJEyx1S4NzeZI6Wbrl9fiR3b3YIh+r0fWaoJEj8p5JJSRGlw31q0VDDod/1B6U/eEQt3FkHXbcvdBrFauHZrB5pGdKCr7Rbq6JhdKalo7ooekeorHk/3ffg7PFZfFRxyk0F42Bs63OVZpy59j185m3WD5O8XIp3+vzPYJrTkwQ9lCz14gZJ9DPxg37hSZCTf7UYy+gSs3Kbq8wxLHhMqdDvb2kNt1p;20:J01oZyjSHDozAGYJphcvMNbYjRdmOmzoa4Vh1lIEA73ZciQOS/v3W5e1Z+FeL0pRWqFX1c9/XKgwYB6+qSw8QC+BmnStc8wfngpBB+hpTXA7WmHDKIP0BvIM6zqaTxUQuX50s+OX4DzkeLHrU3hohmW2lzRiA9nJgCHEswgcjaA= x-ms-office365-filtering-ht: Tenant x-ms-office365-filtering-correlation-id: a071b9df-4ad7-4888-4e0e-08d584b20d45 x-microsoft-antispam: UriScan:;BCL:0;PCL:0;RULEID:(7020095)(4652020)(48565401081)(5600026)(4604075)(3008032)(4534165)(4627221)(201703031133081)(201702281549075)(2017052603328)(7193020);SRVR:DM5PR2101MB0919; 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x-microsoft-antispam-message-info: w2asvxvg7YBzzUMbnL/gvs3Ikw2Ptu0tZqQKq0dMceiMVjVU31fd896NhGItQL1saXFKmlS8tAnBwHL1Mzm2j1vcbkNaj7rm2GikDbbUidX4JeJdOZ8l6FfCm7va6yQocUZhPuRYg/Y2yg02QaY79GLq2cmpztWeLVuFaDbTH3+yvlR1Nj0pu+SVXqjFPLozdUp04Yl3uW6anWXKcjUO9RtuRo5ybqX3lAPG5o2p8a/B6Y2tq/igzR1iUGIDMnHvPdiMgFQttQ29X7NyNfVKcMDMvwRHwu2fkFwlB3XrwFxYj0u5EAd1nGBphUnbz71oNsSGgsyVls61qNARKbyxSA== 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: a071b9df-4ad7-4888-4e0e-08d584b20d45 X-MS-Exchange-CrossTenant-originalarrivaltime: 08 Mar 2018 05:00:10.9321 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47 X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM5PR2101MB0919 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 4b83e9eeab06..7def04049498 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