Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
Received-SPF: SoftFail (protection.outlook.com: domain of transitioning
 cadence.com discourages use of 158.140.1.28 as permitted sender)
X-CrossPremisesHeadersFilteredBySendConnector: maileu3.global.cadence.com
Received: from maileu3.global.cadence.com (10.160.88.99) by
 maileu3.global.cadence.com (10.160.88.99) with Microsoft SMTP Server (TLS) id
 15.0.1367.3; Tue, 3 Dec 2019 11:09:01 +0100
Received: from vleu-orange.cadence.com (10.160.88.83) by
 maileu3.global.cadence.com (10.160.88.99) with Microsoft SMTP Server (TLS) id
 15.0.1367.3 via Frontend Transport; Tue, 3 Dec 2019 11:09:01 +0100
Received: from vleu-orange.cadence.com (localhost.localdomain [127.0.0.1])
        by vleu-orange.cadence.com (8.14.4/8.14.4) with ESMTP id xB3A91h2024901;
        Tue, 3 Dec 2019 11:09:01 +0100
Received: (from sheebab@localhost)
        by vleu-orange.cadence.com (8.14.4/8.14.4/Submit) id xB3A8vUW024826;
        Tue, 3 Dec 2019 11:08:57 +0100
From:   sheebab <sheebab@cadence.com>
To:     <alim.akhtar@samsung.com>, <avri.altman@wdc.com>,
        <pedrom.sousa@synopsys.com>, <jejb@linux.ibm.com>,
        <martin.petersen@oracle.com>, <stanley.chu@mediatek.com>,
        <beanhuo@micron.com>, <yuehaibing@huawei.com>,
        <linux-scsi@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
        <vigneshr@ti.com>
CC:     <mparab@cadence.com>, <rafalc@cadence.com>,
        sheebab <sheebab@cadence.com>
Subject: [PATCH] scsi: ufs: Disable autohibern8 feature in Cadence UFS
Date:   Tue, 3 Dec 2019 11:07:15 +0100
Message-ID: <1575367635-22662-1-git-send-email-sheebab@cadence.com>
X-Mailer: git-send-email 2.4.5
MIME-Version: 1.0
Content-Type: text/plain
X-OrganizationHeadersPreserved: maileu3.global.cadence.com
X-EOPAttributedMessage: 0
X-Forefront-Antispam-Report: CIP:158.140.1.28;IPV:CAL;SCL:-1;CTRY:US;EFV:NLI;SFV:NSPM;SFS:(10009020)(4636009)(346002)(136003)(39860400002)(396003)(376002)(36092001)(189003)(199004)(2616005)(2906002)(426003)(51416003)(356004)(6666004)(4744005)(36756003)(16586007)(316002)(336012)(186003)(26005)(54906003)(110136005)(8936002)(2201001)(8676002)(76130400001)(70586007)(42186006)(86362001)(246002)(50226002)(4326008)(107886003)(5660300002)(7636002)(305945005)(478600001)(87636003)(70206006)(26826003)(50466002)(48376002)(7416002)(921003)(83996005)(1121003)(2101003);DIR:OUT;SFP:1101;SCL:1;SRVR:BY5PR07MB6754;H:sjmaillnx1.cadence.com;FPR:;SPF:SoftFail;LANG:en;PTR:corp.Cadence.COM;MX:1;A:1;
X-MS-PublicTrafficType: Email
X-MS-Office365-Filtering-Correlation-Id: ba5795fa-6b1a-438d-03af-08d777d8d4bd
X-MS-TrafficTypeDiagnostic: BY5PR07MB6754:
X-Microsoft-Antispam-PRVS: <BY5PR07MB67543CD08BCABE862B997801A4420@BY5PR07MB6754.namprd07.prod.outlook.com>
X-MS-Oob-TLC-OOBClassifiers: OLM:5516;
X-Forefront-PRVS: 02408926C4
X-MS-Exchange-SenderADCheck: 1
X-Microsoft-Antispam: BCL:0;
X-Microsoft-Antispam-Message-Info: K07IJPSn8a7kXgxz6racdf4gEl58V7gh+GZrCDW0BbH31tLX6HLlug1JjitZe5zcupDvKtKS2c32/aMn/8qSXD5H7j6iQmohjiriaH21ZUwLR2JgExOM6qh+hBtfrFq1qMZUevM8WwivhWOLX29g2kv3dPMZ9LC4DARiKhq0Rxra6mrEdzP/j2QtEZGz32RVw+yjLmuFsc7rfkV8ET6NWYwq/zYF6lcOfPFWvezmUtaZS82nX9F1JTIQGUuStUaUTQK2o88ER3nipxIGX6znBrdJe7kZlgpZ6bivk/S6gLhziiAhsjFRjeJ8mj2rO6S/F6eUEBH5pMj4MMOwjgY/lnES1jOrOoB61YCeu+Ai1uO7/8bNXaGNKTRLr03vVJ0+lCcVcTG6/YYQwq6dhQX2O1wIU93Qp+q9gfD5hO4trzPWoIwaBTbXrPkq1OzO7e8+
X-OriginatorOrg: cadence.com
X-MS-Exchange-CrossTenant-OriginalArrivalTime: 03 Dec 2019 10:09:06.1442
 (UTC)
X-MS-Exchange-CrossTenant-Network-Message-Id: ba5795fa-6b1a-438d-03af-08d777d8d4bd
X-MS-Exchange-CrossTenant-Id: d36035c5-6ce6-4662-a3dc-e762e61ae4c9
X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=d36035c5-6ce6-4662-a3dc-e762e61ae4c9;Ip=[158.140.1.28];Helo=[sjmaillnx1.cadence.com]
X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem
X-MS-Exchange-Transport-CrossTenantHeadersStamped: BY5PR07MB6754
X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.95,18.0.572
 definitions=2019-12-03_02:2019-11-29,2019-12-03 signatures=0
X-Proofpoint-Spam-Details: rule=outbound_check_notspam policy=outbound_check score=0 adultscore=0
 spamscore=0 suspectscore=0 clxscore=1015 mlxlogscore=853 phishscore=0
 impostorscore=0 malwarescore=0 bulkscore=0 lowpriorityscore=0
 priorityscore=1501 mlxscore=0 classifier=spam adjust=0 reason=mlx
 scancount=1 engine=8.12.0-1910280000 definitions=main-1912030081
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

This patch disables autohibern8 feature in Cadence UFS. 
The autohibern8 feature has issues due to which unexpected interrupt
trigger is happening. After the interrupt issue is sorted out autohibern8
feature will be re-enabled

Signed-off-by: sheebab <sheebab@cadence.com>
---
 drivers/scsi/ufs/cdns-pltfrm.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/scsi/ufs/cdns-pltfrm.c b/drivers/scsi/ufs/cdns-pltfrm.c
index b2af04c57a39..882425d1166b 100644
--- a/drivers/scsi/ufs/cdns-pltfrm.c
+++ b/drivers/scsi/ufs/cdns-pltfrm.c
@@ -98,6 +98,12 @@ static int cdns_ufs_link_startup_notify(struct ufs_hba *hba,
 	 * completed.
 	 */
 	ufshcd_dme_set(hba, UIC_ARG_MIB(PA_LOCAL_TX_LCC_ENABLE), 0);
+
+	/*
+	 * Disabling Autohibern8 feature in cadence UFS
+	 * to mask unexpected interrupt trigger.
+	 */
+	hba->ahit = 0;
 
 	return 0;
 }
-- 
2.17.1