2 files changed, 13 insertions, 7 deletions

diff --git a/drivers/acpi/nfit/core.c b/drivers/acpi/nfit/core.c
index bbe48ad20886..eb09ef55c38a 100644
--- a/drivers/acpi/nfit/core.c
+++ b/drivers/acpi/nfit/core.c
@@ -2675,10 +2675,14 @@ static int acpi_nfit_register_region(struct acpi_nfit_desc *acpi_desc,
         else
                 ndr_desc->numa_node = NUMA_NO_NODE;
 
-        if(acpi_desc->platform_cap & ACPI_NFIT_CAPABILITY_CACHE_FLUSH)
+        /*
+         * Persistence domain bits are hierarchical, if
+         * ACPI_NFIT_CAPABILITY_CACHE_FLUSH is set then
+         * ACPI_NFIT_CAPABILITY_MEM_FLUSH is implied.
+         */
+        if (acpi_desc->platform_cap & ACPI_NFIT_CAPABILITY_CACHE_FLUSH)
                 set_bit(ND_REGION_PERSIST_CACHE, &ndr_desc->flags);
-
-        if (acpi_desc->platform_cap & ACPI_NFIT_CAPABILITY_MEM_FLUSH)
+        else if (acpi_desc->platform_cap & ACPI_NFIT_CAPABILITY_MEM_FLUSH)
                 set_bit(ND_REGION_PERSIST_MEMCTRL, &ndr_desc->flags);
 
         list_for_each_entry(nfit_memdev, &acpi_desc->memdevs, list) {
diff --git a/drivers/nvdimm/region_devs.c b/drivers/nvdimm/region_devs.c
index a8e9d428c0a5..1593e1806b16 100644
--- a/drivers/nvdimm/region_devs.c
+++ b/drivers/nvdimm/region_devs.c
@@ -532,11 +532,13 @@ static ssize_t persistence_domain_show(struct device *dev,
                 struct device_attribute *attr, char *buf)
 {
         struct nd_region *nd_region = to_nd_region(dev);
-        unsigned long flags = nd_region->flags;
 
-        return sprintf(buf, "%s%s\n",
-                        flags & BIT(ND_REGION_PERSIST_CACHE) ? "cpu_cache " : "",
-                        flags & BIT(ND_REGION_PERSIST_MEMCTRL) ? "memory_controller " : "");
+        if (test_bit(ND_REGION_PERSIST_CACHE, &nd_region->flags))
+                return sprintf(buf, "cpu_cache\n");
+        else if (test_bit(ND_REGION_PERSIST_MEMCTRL, &nd_region->flags))
+                return sprintf(buf, "memory_controller\n");
+        else
+                return sprintf(buf, "\n");
 }
 static DEVICE_ATTR_RO(persistence_domain);