CXL 3.2 Spec mentions CXL LSA 2.1 Namespace Labels at section 9.13.2.5. If Namespace label is present in LSA during nvdimm_probe() then dimm-physical-address(DPA) reservation is required. But this reservation is not required by cxl region label. Therefore if LSA scanning finds any region label, skip it.
Reviewed-by: Ira Weiny <[email protected]> Reviewed-by: Jonathan Cameron <[email protected]> Reviewed-by: Dave Jiang <[email protected]> Signed-off-by: Neeraj Kumar <[email protected]> --- drivers/nvdimm/label.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/nvdimm/label.c b/drivers/nvdimm/label.c index 5a4599c5e5a8..f18b04f63dcc 100644 --- a/drivers/nvdimm/label.c +++ b/drivers/nvdimm/label.c @@ -471,6 +471,13 @@ int nd_label_reserve_dpa(struct nvdimm_drvdata *ndd) lsa_label = to_lsa_label(ndd, slot); nd_label = &lsa_label->ns_label; + /* + * If the LSA label is a region label then it doesn't + * require a dimm-physical-address(DPA) reservation. + */ + if (is_region_label(ndd, lsa_label)) + continue; + if (!slot_valid(ndd, lsa_label, slot)) continue; -- 2.34.1
