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Thu, 8 Mar 2018 00:11:55 -0500 Received: from mail-dm3nam03on0132.outbound.protection.outlook.com ([104.47.41.132]:45039 "EHLO NAM03-DM3-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S966479AbeCHFLv (ORCPT ); Thu, 8 Mar 2018 00:11:51 -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 3.18 51/53] drm/omap: DMM: Check for DMM readiness after successful transaction commit Thread-Topic: [PATCH AUTOSEL for 3.18 51/53] drm/omap: DMM: Check for DMM readiness after successful transaction commit Thread-Index: AQHTtprM++EQgp4A50igXo1ViMCDXA== Date: Thu, 8 Mar 2018 05:03:29 +0000 Message-ID: <20180308050230.8876-51-alexander.levin@microsoft.com> References: <20180308050230.8876-1-alexander.levin@microsoft.com> In-Reply-To: <20180308050230.8876-1-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;DM5PR2101MB1112;7:wi9dkGEMDY0zueAwldiCrfPypjfDn95nANn7elEV1DPvgSA3uZN4KUumGMfW7nJRrPQlbnBLWLX6ELbQpyTdHILvDW9z6ngt7aF8oCy6YU5DncShD0GrLLquOb5uTB1xhg+rGjpnI3feTIBOGmuoAUbckwchlRcoc2oCOOUtj63oVPxqMA35CldJS4KQY3x9yeDRuRwAX/kBGjKCzlqIUyWmitcy1S3V1pb8FONCaP5PuVg/nK7PxszbxJ4EV1ji;20:Wi5PNz8GWedlKjhdeN4LbELwxlDu2fAeOA8Rt1EyKorWLYkKu5dlTO0Jwb3rtd88Xn2OUmoO5R89liAnO398qWNMJ34n0CoN5OuFQOwIt47JDskrwnYhCzObfttI9zAqDr+8kFX9ZaRbTyTeEDSz/GBDUYNrB2casd0S4IzrlNg= x-ms-office365-filtering-ht: Tenant x-ms-office365-filtering-correlation-id: ef4faf48-ea88-41f2-784e-08d584b31856 x-microsoft-antispam: UriScan:;BCL:0;PCL:0;RULEID:(7020095)(4652020)(48565401081)(5600026)(4604075)(3008032)(4534165)(4627221)(201703031133081)(201702281549075)(2017052603328)(7193020);SRVR:DM5PR2101MB1112; 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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 56c60552abba..f732d4ce7e4f 100644 --- a/drivers/gpu/drm/omapdrm/omap_dmm_tiler.c +++ b/drivers/gpu/drm/omapdrm/omap_dmm_tiler.c @@ -280,7 +280,12 @@ static int dmm_txn_commit(struct dmm_txn *txn, bool wa= it) msecs_to_jiffies(1)) <=3D 0) { 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