[PATCH 2/2] nvme-multipath: enable PCI P2PDMA for multipath devices

[Chaitanya Kulkarni <kch@nvidia.com>]

NVMe multipath does not expose BLK_FEAT_PCI_P2PDMA on the head disk
even when the underlying controller supports it.

Set BLK_FEAT_PCI_P2PDMA in nvme_mpath_alloc_disk() when the controller
advertises P2PDMA support via ctrl->ops->supports_pci_p2pdma.

Signed-off-by: Chaitanya Kulkarni <kch@nvidia.com>
Signed-off-by: Kiran Kumar Modukuri <kmodukuri@nvidia.com>
---
 drivers/nvme/host/multipath.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/nvme/host/multipath.c b/drivers/nvme/host/multipath.c
index ba00f0b72b85..c49fca43ef19 100644
--- a/drivers/nvme/host/multipath.c
+++ b/drivers/nvme/host/multipath.c
@@ -737,6 +737,9 @@ int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl, struct nvme_ns_head *head)
 		BLK_FEAT_POLL | BLK_FEAT_ATOMIC_WRITES;
 	if (head->ids.csi == NVME_CSI_ZNS)
 		lim.features |= BLK_FEAT_ZONED;
+	if (ctrl->ops && ctrl->ops->supports_pci_p2pdma &&
+	    ctrl->ops->supports_pci_p2pdma(ctrl))
+		lim.features |= BLK_FEAT_PCI_P2PDMA;
 
 	head->disk = blk_alloc_disk(&lim, ctrl->numa_node);
 	if (IS_ERR(head->disk))
-- 
2.39.5