diff options
| -rw-r--r-- | drivers/nvdimm/bus.c | 29 |
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; } |