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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: y0rhCTqaa2uekZGEQGeLFiveBrzYkokgCvKbCGdGO2TiumCoLIvzuVm4F2N5dVpb+sBAhUZEQCOOUHV6FO8+ZC+dHL4HjRGfCQtQFsHQCcIYg9v1lOiu3tcX2T/v9Q717SXaaCywXqBPAbiD7ZtJA+tgDvPyk+IDwMjDvNDe7q1s4ftW5bXDUoYnGa6OD4RVs24EvhFxLZXaxf/b2pG4zPM/0iq2OFEbFsV1V/DYEbKq6Cst60jObE/i5NnvtI77R+uvZ4hBeqZvjXZlfpYzT0QHGy9xlYmwmqWv7EBkucuAfI3HTgO8W0CmkJMg0Qhd5ltJJ3qkYoSJLryUUml5CtIdJUZewyjTqTrqu7pKzwin0OU4+9/1EuNN3fVyClDHGZz6P6C2OvZ9Ij0fn0bd2+y10KXA9LwJreHZgItvDg7FWXUrMoCc2BkYfadEdBQD X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 16 Apr 2026 21:27:34.0094 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: a7f6cadf-b263-407f-5e53-08de9bfef968 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.160];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: SA2PEPF00003F67.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS2PR12MB9800 From: Kiran Kumar Modukuri NVMe multipath does not expose BLK_FEAT_PCI_P2PDMA on the head disk even when all underlying controllers support it. Set BLK_FEAT_PCI_P2PDMA unconditionally in nvme_mpath_alloc_disk() alongside the other features. nvme_update_ns_info_block() already calls queue_limits_stack_bdev() to stack each path's limits onto the head disk, which routes through blk_stack_limits(). The core now clears BLK_FEAT_PCI_P2PDMA automatically if any path (e.g., FC) does not support it, consistent with how BLK_FEAT_NOWAIT and BLK_FEAT_POLL are handled. Signed-off-by: Kiran Kumar Modukuri Signed-off-by: Chaitanya Kulkarni --- drivers/nvme/host/multipath.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/nvme/host/multipath.c b/drivers/nvme/host/multipath.c index ba00f0b72b85..957e39c4795d 100644 --- a/drivers/nvme/host/multipath.c +++ b/drivers/nvme/host/multipath.c @@ -734,7 +734,7 @@ int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl, struct nvme_ns_head *head) blk_set_stacking_limits(&lim); lim.dma_alignment = 3; lim.features |= BLK_FEAT_IO_STAT | BLK_FEAT_NOWAIT | - BLK_FEAT_POLL | BLK_FEAT_ATOMIC_WRITES; + BLK_FEAT_POLL | BLK_FEAT_ATOMIC_WRITES | BLK_FEAT_PCI_P2PDMA; if (head->ids.csi == NVME_CSI_ZNS) lim.features |= BLK_FEAT_ZONED; -- 2.39.5