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; Fri, 5 Apr 2019 09:27:18 +0200
Received: from lvloginb.cadence.com (10.165.177.11) by
 maileu3.global.cadence.com (10.160.88.99) with Microsoft SMTP Server (TLS) id
 15.0.1367.3 via Frontend Transport; Fri, 5 Apr 2019 09:27:18 +0200
Received: from lvloginb.cadence.com (localhost [127.0.0.1])
        by lvloginb.cadence.com (8.14.4/8.14.4) with ESMTP id x357RIku026460;
        Fri, 5 Apr 2019 08:27:18 +0100
Received: (from jank@localhost)
        by lvloginb.cadence.com (8.14.4/8.14.4/Submit) id x357RFTV026441;
        Fri, 5 Apr 2019 08:27:15 +0100
From:   Jan Kotas <jank@cadence.com>
To:     <vkoul@kernel.org>, <sanyog.r.kale@intel.com>,
        <pierre-louis.bossart@linux.intel.com>
CC:     <alsa-devel@alsa-project.org>, <linux-kernel@vger.kernel.org>,
        Jan Kotas <jank@cadence.com>
Subject: [PATCH] soundwire: fix pm_runtime_get_sync return code checks
Date:   Fri, 5 Apr 2019 08:26:55 +0100
Message-ID: <20190405072655.25995-1-jank@cadence.com>
X-Mailer: git-send-email 2.15.0
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)(346002)(39860400002)(396003)(376002)(136003)(2980300002)(3190300001)(189003)(199004)(36092001)(50226002)(4326008)(42186006)(2201001)(186003)(5660300002)(14444005)(86362001)(8936002)(2906002)(316002)(48376002)(16586007)(107886003)(50466002)(426003)(54906003)(110136005)(478600001)(1076003)(36756003)(51416003)(87636003)(6666004)(336012)(356004)(105596002)(26005)(26826003)(126002)(486006)(7636002)(8676002)(2616005)(47776003)(305945005)(476003)(246002)(106466001)(76130400001);DIR:OUT;SFP:1101;SCL:1;SRVR:DM6PR07MB4716;H:sjmaillnx2.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: b2a47ae1-cc81-4a11-b58e-08d6b99824b2
X-Microsoft-Antispam: BCL:0;PCL:0;RULEID:(2390118)(7020095)(4652040)(8989299)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(5600139)(711020)(4605104)(2017052603328);SRVR:DM6PR07MB4716;
X-MS-TrafficTypeDiagnostic: DM6PR07MB4716:
X-Microsoft-Antispam-PRVS: <DM6PR07MB4716D905BD4CBE76E9CF8BCCD0510@DM6PR07MB4716.namprd07.prod.outlook.com>
X-Forefront-PRVS: 0998671D02
X-MS-Exchange-SenderADCheck: 1
X-Microsoft-Antispam-Message-Info: xQjupB5jNgew6sgdNImkwy90sjulRrUfBwoNTtKwaaYTwLmsMK3VXS6dv5FU7XJ2OGp1dDjKbwGT47mJStRb3dc3h29CUzPvgsCciOaYlBsLVBZoWIBmBrS8OTWrJHUY0HSHCef0JgiQzAC9FA/ASVNV6b2PdPJFuFSc9nyAPbQEH9CGhaHdnQ95ZQnd0C/NGdJjzafkDCuifuGcAgsV6HlY02/dZ8IzHXC7kXWleuLm1CAlU6T0BNU6qyNCgCiQuqCTky+qW7pcy/eCSbAb68rFu07hcXOUisHgTSDt5Zu2oVXj8HdJIGCzz5IKLd3yhJ174yPp4st7dgYB2XRqPqJp4CrAbwcpWI/zpFchSeAJcU3jrQp+B3VYzQEWYLMBgw2ZTvQ9TlDNcFQ5Diqom74pN9Fbr//0ygZm16jykYI=
X-OriginatorOrg: cadence.com
X-MS-Exchange-CrossTenant-OriginalArrivalTime: 05 Apr 2019 07:27:21.9331
 (UTC)
X-MS-Exchange-CrossTenant-Network-Message-Id: b2a47ae1-cc81-4a11-b58e-08d6b99824b2
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=[sjmaillnx2.cadence.com]
X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem
X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR07MB4716
X-Proofpoint-SPF-Result: pass
X-Proofpoint-SPF-Record: v=spf1 include:_spf.salesforce.com include:mktomail.com
 include:spf-0014ca01.pphosted.com include:spf.protection.outlook.com
 include:auth.msgapp.com include:spf.mandrillapp.com ~all
X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-04-05_05:,,
 signatures=0
X-Proofpoint-Spam-Details: rule=outbound_check_notspam policy=outbound_check score=0
 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0
 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0
 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx
 scancount=1 engine=8.0.1-1810050000 definitions=main-1904050055
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

When PM is disabled it returns -EACCES, which is currently
threated as an error, and prevents accessing the slave's
registers.

This patch ignores the -EACCES return value from
pm_runtime_get_sync() to let the SoundWire work in systems
without runtime PM.

Signed-off-by: Jan Kotas <jank@cadence.com>
---
 drivers/soundwire/bus.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/soundwire/bus.c b/drivers/soundwire/bus.c
index 1cbfedfc2..6567ff439 100644
--- a/drivers/soundwire/bus.c
+++ b/drivers/soundwire/bus.c
@@ -328,7 +328,7 @@ int sdw_nread(struct sdw_slave *slave, u32 addr, size_t count, u8 *val)
 		return ret;
 
 	ret = pm_runtime_get_sync(slave->bus->dev);
-	if (ret < 0)
+	if (ret < 0 && ret != -EACCES)
 		return ret;
 
 	ret = sdw_transfer(slave->bus, &msg);
@@ -356,7 +356,7 @@ int sdw_nwrite(struct sdw_slave *slave, u32 addr, size_t count, u8 *val)
 		return ret;
 
 	ret = pm_runtime_get_sync(slave->bus->dev);
-	if (ret < 0)
+	if (ret < 0 && ret != -EACCES)
 		return ret;
 
 	ret = sdw_transfer(slave->bus, &msg);
-- 
2.15.0