[PATCH V3 09/20] nvdimm/namespace_label: Skip region label during ns label DPA reservation

Neeraj Kumar
2025-09-17T13:41:50Z

If Namespace label is present in LSA during nvdimm_probe() then DPA
reservation is required. But this reservation is not required by region
label. Therefore if LSA scanning finds any region label, skip it.

Signed-off-by: Neeraj Kumar <s.neeraj@samsung.com>
---
drivers/nvdimm/label.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/nvdimm/label.c b/drivers/nvdimm/label.c
index 5e476154cf81..935a0df5b47e 100644
--- a/drivers/nvdimm/label.c
+++ b/drivers/nvdimm/label.c
@@ -441,6 +441,7 @@ int nd_label_reserve_dpa(struct nvdimm_drvdata *ndd)
return 0; /* no label, nothing to reserve */

for_each_clear_bit_le(slot, free, nslot) {
+ union nd_lsa_label *lsa_label;
struct nd_namespace_label *nd_label;
struct nd_region *nd_region = NULL;
struct nd_label_id label_id;
@@ -448,9 +449,14 @@ int nd_label_reserve_dpa(struct nvdimm_drvdata *ndd)
uuid_t label_uuid;
u32 flags;

- nd_label = to_label(ndd, slot);
+ lsa_label = (union nd_lsa_label *) to_label(ndd, slot);
+ nd_label = &lsa_label->ns_label;

- if (!slot_valid(ndd, (union nd_lsa_label *) nd_label, slot))
+ /* Skip region label. DPA reservation is for NS label only */
+ if (is_region_label(ndd, lsa_label))
+ continue;
+
+ if (!slot_valid(ndd, lsa_label, slot))
continue;

nsl_get_uuid(ndd, nd_label, &label_uuid);
--
2.34.1