[PATCH 03/10] nvme-multipath: add BLK_FEAT_WRITE_ZEROES_UNMAP support

Zhang Yi
2025-06-04T02:21:46Z

From: Zhang Yi <yi.zhang@huawei.com>

Set the BLK_FEAT_WRITE_ZEROES_UNMAP feature while creating multipath
stacking queue limits by default. This feature shall be disabled if any
attached namespace does not support it.

Signed-off-by: Zhang Yi <yi.zhang@huawei.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
---
drivers/nvme/host/multipath.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/nvme/host/multipath.c b/drivers/nvme/host/multipath.c
index 878ea8b1a0ac..6a6d827fa7ee 100644
--- a/drivers/nvme/host/multipath.c
+++ b/drivers/nvme/host/multipath.c
@@ -745,7 +745,8 @@ 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_WRITE_ZEROES_UNMAP;
if (head->ids.csi == NVME_CSI_ZNS)
lim.features |= BLK_FEAT_ZONED;

--
2.46.1