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dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=nvidia.com; Received-SPF: Pass (protection.outlook.com: domain of nvidia.com designates 216.228.117.161 as permitted sender) receiver=protection.outlook.com; client-ip=216.228.117.161; helo=mail.nvidia.com; pr=C Received: from mail.nvidia.com (216.228.117.161) by CH2PEPF0000013D.mail.protection.outlook.com (10.167.244.69) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.21.25.13 via Frontend Transport; Wed, 13 May 2026 18:52:50 +0000 Received: from rnnvmail201.nvidia.com (10.129.68.8) by mail.nvidia.com (10.129.200.67) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.20; Wed, 13 May 2026 11:52:30 -0700 Received: from dev.nvidia.com (10.126.230.37) by rnnvmail201.nvidia.com (10.129.68.8) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.20; Wed, 13 May 2026 11:52:24 -0700 From: Chaitanya Kulkarni To: , , , , , , CC: , , , , Chaitanya Kulkarni , Pranjal Shrivastava , Nitesh Shetty Subject: [PATCH V4 1/3] block: clear BLK_FEAT_PCI_P2PDMA in blk_stack_limits() for non-supporting devices Date: Wed, 13 May 2026 11:51:51 -0700 Message-ID: <20260513185153.95552-2-kch@nvidia.com> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20260513185153.95552-1-kch@nvidia.com> References: <20260513185153.95552-1-kch@nvidia.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Originating-IP: [10.126.230.37] X-ClientProxiedBy: rnnvmail201.nvidia.com (10.129.68.8) To rnnvmail201.nvidia.com (10.129.68.8) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CH2PEPF0000013D:EE_|CH3PR12MB9250:EE_ X-MS-Office365-Filtering-Correlation-Id: 569b0171-a628-4944-8e3c-08deb120d4e4 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|82310400026|376014|7416014|1800799024|36860700016|11063799003|22082099003|18002099003|56012099003; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: sUvc7gmMQ5yN2675uI2uIZN/cfZ/swv0BT/9XvLvodK9uaGMo3lnthjGbBDqn/npnrPjttyDAU4QyEq0hOE5lEQem8vP3VmolsG9tem1iDq54Of5a7HSCy1tKNLhYiSNnl5TznlBFhjIcAum+rbj7ZS4qSST9RAHv53TiJxBYFF2IDCvXTrrCJwWbDWRZgZcdNwIriDKtpPYeMFM7XFYELck0u+M/KQhJZ2azG+QNfgfEfvlRVGbBy/kLtRWgCIdEFWBDRoGlbzltYqMjh6DN5RwSP5CfqvtTZ1n4ZayPO25NMMsIfNIJOaLqU5XjIQomkoxKeuTf0YEGJScZzHNCtfS6fVk95pzwrCs0JamATEnE+uB6WX0/tAt/cUuM4PAKcmTlpNdEzeud6TnN1iAeJz3vGvzYS+G1ITj/j45LsC34FoNRnJDoEwjWgZmmq86 X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 13 May 2026 18:52:50.0399 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 569b0171-a628-4944-8e3c-08deb120d4e4 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.161];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: CH2PEPF0000013D.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH3PR12MB9250 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260513_115307_214173_2D6C6DDF X-CRM114-Status: GOOD ( 10.99 ) X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org BLK_FEAT_NOWAIT and BLK_FEAT_POLL are cleared in blk_stack_limits() when an underlying device does not support them. Apply the same treatment to BLK_FEAT_PCI_P2PDMA: stacking drivers set it unconditionally and rely on the core to clear it whenever a non-supporting member device is stacked. Tested-by: Pranjal Shrivastava Reviewed-by: Christoph Hellwig Reviewed-by: Sagi Grimberg Reviewed-by: Nitesh Shetty Signed-off-by: Chaitanya Kulkarni --- block/blk-settings.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/block/blk-settings.c b/block/blk-settings.c index 78c83817b9d3..8274631290db 100644 --- a/block/blk-settings.c +++ b/block/blk-settings.c @@ -795,6 +795,8 @@ int blk_stack_limits(struct queue_limits *t, struct queue_limits *b, t->features &= ~BLK_FEAT_NOWAIT; if (!(b->features & BLK_FEAT_POLL)) t->features &= ~BLK_FEAT_POLL; + if (!(b->features & BLK_FEAT_PCI_P2PDMA)) + t->features &= ~BLK_FEAT_PCI_P2PDMA; t->flags |= (b->flags & BLK_FLAG_MISALIGNED); -- 2.39.5