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Thu, 8 Mar 2018 00:07:58 -0500 Received: from mail-bl2nam02on0095.outbound.protection.outlook.com ([104.47.38.95]:56636 "EHLO NAM02-BL2-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S966647AbeCHFH5 (ORCPT ); Thu, 8 Mar 2018 00:07:57 -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 4.4 092/101] drm/omap: DMM: Check for DMM readiness after successful transaction commit Thread-Topic: [PATCH AUTOSEL for 4.4 092/101] drm/omap: DMM: Check for DMM readiness after successful transaction commit Thread-Index: AQHTtpqf9FVUZZoz8kexDLK01B9xSA== Date: Thu, 8 Mar 2018 05:02:13 +0000 Message-ID: <20180308050023.8548-92-alexander.levin@microsoft.com> References: <20180308050023.8548-1-alexander.levin@microsoft.com> In-Reply-To: <20180308050023.8548-1-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;DM5PR2101MB0727;7:9RYGV+jyla389xUx/eks419XYnMs+cRDDC1pQ3DG+eK5M46rPotzDQwCBt9GGeWuY2+66Voe2MzB73xCjBJc/BcqSavOWg4JizzfP4QmMvEcIl56QmVArLT+sRw2dhWMgBuAd3NeM7irT+BvnCO9Z3szuuYYyL6zV7BEY+1SRHIzAGjFnlQFmSAQ2rG5rZlOQm59EF2e4uIOTkrXAQizTAm5eMNKrz60tXRDA9vU5s5mSCCOlGVwK0EXTvqn4C1k;20:WFVpCcBakzQ1NYSfs4fPv++QJ7s3dXV02LSgSF84pWJNmi1H6Yq6S2evf9/iBDFoSwBktUoigtvzOQCrQfmXGJbfIIkGq1WZr35syOW1MlIl6b6FgyvAG3Ijk6DB/wiWIQfEU8Tt8eqzvHQrS+akoz8b5TfPGO8qBIHdfVpnvns= x-ms-office365-filtering-ht: Tenant x-ms-office365-filtering-correlation-id: 1c4b11a0-241c-44e5-e387-08d584b28bf3 x-microsoft-antispam: UriScan:;BCL:0;PCL:0;RULEID:(7020095)(4652020)(48565401081)(5600026)(4604075)(3008032)(4534165)(4627221)(201703031133081)(201702281549075)(2017052603328)(7193020);SRVR:DM5PR2101MB0727; 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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 f516b5891932..083db3f5181f 100644 --- a/drivers/gpu/drm/omapdrm/omap_dmm_tiler.c +++ b/drivers/gpu/drm/omapdrm/omap_dmm_tiler.c @@ -288,7 +288,12 @@ 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