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-rw-r--r--drivers/nvdimm/Makefile1
-rw-r--r--drivers/nvdimm/namespace_devs.c9
-rw-r--r--drivers/nvdimm/pmem.h1
3 files changed, 11 insertions, 0 deletions
diff --git a/drivers/nvdimm/Makefile b/drivers/nvdimm/Makefile
index 909554c3f955..447e0e14f3b6 100644
--- a/drivers/nvdimm/Makefile
+++ b/drivers/nvdimm/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
obj-$(CONFIG_LIBNVDIMM) += libnvdimm.o
obj-$(CONFIG_BLK_DEV_PMEM) += nd_pmem.o
obj-$(CONFIG_ND_BTT) += nd_btt.o
diff --git a/drivers/nvdimm/namespace_devs.c b/drivers/nvdimm/namespace_devs.c
index 1427a386a033..3e4d1e7998da 100644
--- a/drivers/nvdimm/namespace_devs.c
+++ b/drivers/nvdimm/namespace_devs.c
@@ -1417,6 +1417,15 @@ static int btt_claim_class(struct device *dev)
struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
struct nd_namespace_index *nsindex;
+ /*
+ * If any of the DIMMs do not support labels the only
+ * possible BTT format is v1.
+ */
+ if (!ndd) {
+ loop_bitmask = 0;
+ break;
+ }
+
nsindex = to_namespace_index(ndd, ndd->ns_current);
if (nsindex == NULL)
loop_bitmask |= 1;
diff --git a/drivers/nvdimm/pmem.h b/drivers/nvdimm/pmem.h
index c5917f040fa7..6a3cd2a10db6 100644
--- a/drivers/nvdimm/pmem.h
+++ b/drivers/nvdimm/pmem.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __NVDIMM_PMEM_H__
#define __NVDIMM_PMEM_H__
#include <linux/badblocks.h>