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Wysocki" , Len Brown , linux-acpi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH] ACPI/IORT: Fix PMCG node always look for a single ID mapping. Date: Mon, 11 May 2020 13:22:56 -0700 Message-Id: <1589228576-18053-1-git-send-email-tuanphan@os.amperecomputing.com> X-Mailer: git-send-email 2.7.4 Content-Type: text/plain X-ClientProxiedBy: BY5PR16CA0019.namprd16.prod.outlook.com (2603:10b6:a03:1a0::32) To BYAPR01MB4598.prod.exchangelabs.com (2603:10b6:a03:8a::18) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from aptiov-dev-Latitude-E7470.amperecomputing.com (4.28.12.214) by BY5PR16CA0019.namprd16.prod.outlook.com (2603:10b6:a03:1a0::32) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256) id 15.20.2979.28 via Frontend Transport; Mon, 11 May 2020 20:24:13 +0000 X-Mailer: git-send-email 2.7.4 X-Originating-IP: [4.28.12.214] X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 73cb5893-38a8-4b5b-23f4-08d7f5e94564 X-MS-TrafficTypeDiagnostic: BYAPR01MB5382:|BYAPR01MB5382: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:1201; X-Forefront-PRVS: 04004D94E2 X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:BYAPR01MB4598.prod.exchangelabs.com;PTR:;CAT:NONE;SFTY:;SFS:(4636009)(376002)(396003)(39840400004)(136003)(366004)(346002)(33430700001)(8676002)(6666004)(316002)(186003)(16526019)(2616005)(86362001)(33440700001)(956004)(34206002)(54906003)(2906002)(478600001)(66946007)(66556008)(6506007)(26005)(52116002)(4326008)(66476007)(6512007)(4744005)(5660300002)(6486002)(8936002);DIR:OUT;SFP:1102; X-MS-Exchange-AntiSpam-MessageData: 7TCl7MPWD3xeFxGg7BUtgHyj0nQxyIr83Oq+UuXxsPqNSsPHN2W5i5UzbVCDIDnJtz4akjFFim93P5YjqpC4viyjq8jORlkN0CaMdM6x6WznIDDxkwAo3gCi+PZVtz+ZsKjGRHiUR1W+qLP5z6hv2Fr+lKmz9gZlLZpl5pN9ftAKxssOHIavgcwRXTZyxye9J/fAlol7DyAaoIPTqIsrtVjhyWOn7jMpbBqH9BRxAjYZmodHHRHyU8RedzCfRzXQGgo8bd7xbh8bVrec/6VCGb/N+QVvRaRKQfhYBrNeLZryNuTI1ej58pIgmVrYgohbJTwVroKvW4hCNVmb9MctTOFaFxzCgz9N+PMLhsM5laRhYgU4Z/IK0OnxKKqSAYxS/NCWeDfpKLbrm0PgINFQJoNENW/JXgxHT4/moSFzSR2nEkMS6WdaO1GFUFPUlr7LBEUubOZ/rVNwcNFg1sdhWi2Ib/o/RoY/VBHynTQbOMA= X-OriginatorOrg: os.amperecomputing.com X-MS-Exchange-CrossTenant-Network-Message-Id: 73cb5893-38a8-4b5b-23f4-08d7f5e94564 X-MS-Exchange-CrossTenant-OriginalArrivalTime: 11 May 2020 20:24:14.2654 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 3bc2b170-fd94-476d-b0ce-4229bdc904a7 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: NOZgATAa8OxObk1HDB4eOhLxvtrKOeLmfUXmiGdE6015AbFJiVKvWms7/T1ketATQUs7/lGO8Btj71g6rdXf4e5oDdscVfolhVOwXgZqOR5gb+xEyHskGeNsp4ctg6Rc X-MS-Exchange-Transport-CrossTenantHeadersStamped: BYAPR01MB5382 Sender: linux-acpi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org PMCG node can have zero ID mapping if its overflow interrupt is wire based. The code to parse PMCG node can not assume it will have a single ID mapping. Signed-off-by: Tuan Phan --- drivers/acpi/arm64/iort.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c index ed3d2d1..72444e1 100644 --- a/drivers/acpi/arm64/iort.c +++ b/drivers/acpi/arm64/iort.c @@ -441,7 +441,9 @@ static int iort_get_id_mapping_index(struct acpi_iort_node *node) return smmu->id_mapping_index; case ACPI_IORT_NODE_PMCG: - return 0; + if (node->mapping_count) + return 0; + return -EINVAL; default: return -EINVAL; } -- 2.7.4