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-rw-r--r--drivers/nvdimm/bus.c29
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/nvdimm/bus.c b/drivers/nvdimm/bus.c
index 1d330d46d036..f76d709426f7 100644
--- a/drivers/nvdimm/bus.c
+++ b/drivers/nvdimm/bus.c
@@ -685,17 +685,46 @@ static ssize_t numa_node_show(struct device *dev,
}
static DEVICE_ATTR_RO(numa_node);
+static int nvdimm_dev_to_target_node(struct device *dev)
+{
+ struct device *parent = dev->parent;
+ struct nd_region *nd_region = NULL;
+
+ if (is_nd_region(dev))
+ nd_region = to_nd_region(dev);
+ else if (parent && is_nd_region(parent))
+ nd_region = to_nd_region(parent);
+
+ if (!nd_region)
+ return NUMA_NO_NODE;
+ return nd_region->target_node;
+}
+
+static ssize_t target_node_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ return sprintf(buf, "%d\n", nvdimm_dev_to_target_node(dev));
+}
+static DEVICE_ATTR_RO(target_node);
+
static struct attribute *nd_numa_attributes[] = {
&dev_attr_numa_node.attr,
+ &dev_attr_target_node.attr,
NULL,
};
static umode_t nd_numa_attr_visible(struct kobject *kobj, struct attribute *a,
int n)
{
+ struct device *dev = container_of(kobj, typeof(*dev), kobj);
+
if (!IS_ENABLED(CONFIG_NUMA))
return 0;
+ if (a == &dev_attr_target_node.attr &&
+ nvdimm_dev_to_target_node(dev) == NUMA_NO_NODE)
+ return 0;
+
return a->mode;
}