diff options
Diffstat (limited to 'drivers/base/core.c')
| -rw-r--r-- | drivers/base/core.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/drivers/base/core.c b/drivers/base/core.c index 8b651bfc1d88..dcdbf3fa3222 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -1333,6 +1333,34 @@ static ssize_t online_store(struct device *dev, struct device_attribute *attr, } static DEVICE_ATTR_RW(online); +static ssize_t suppliers_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct device_link *link; + size_t count = 0; + + list_for_each_entry(link, &dev->links.suppliers, c_node) + count += scnprintf(buf + count, PAGE_SIZE - count, "%s\n", + dev_name(link->supplier)); + + return count; +} +static DEVICE_ATTR_RO(suppliers); + +static ssize_t consumers_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct device_link *link; + size_t count = 0; + + list_for_each_entry(link, &dev->links.consumers, s_node) + count += scnprintf(buf + count, PAGE_SIZE - count, "%s\n", + dev_name(link->consumer)); + + return count; +} +static DEVICE_ATTR_RO(consumers); + int device_add_groups(struct device *dev, const struct attribute_group **groups) { return sysfs_create_groups(&dev->kobj, groups); @@ -1504,8 +1532,20 @@ static int device_add_attrs(struct device *dev) goto err_remove_dev_groups; } + error = device_create_file(dev, &dev_attr_suppliers); + if (error) + goto err_remove_online; + + error = device_create_file(dev, &dev_attr_consumers); + if (error) + goto err_remove_suppliers; + return 0; + err_remove_suppliers: + device_remove_file(dev, &dev_attr_suppliers); + err_remove_online: + device_remove_file(dev, &dev_attr_online); err_remove_dev_groups: device_remove_groups(dev, dev->groups); err_remove_type_groups: @@ -1523,6 +1563,8 @@ static void device_remove_attrs(struct device *dev) struct class *class = dev->class; const struct device_type *type = dev->type; + device_remove_file(dev, &dev_attr_consumers); + device_remove_file(dev, &dev_attr_suppliers); device_remove_file(dev, &dev_attr_online); device_remove_groups(dev, dev->groups); |