v4.19.13 snapshot.
diff --git a/net/wireless/sysfs.c b/net/wireless/sysfs.c
new file mode 100644
index 0000000..6ab32f6
--- /dev/null
+++ b/net/wireless/sysfs.c
@@ -0,0 +1,175 @@
+/*
+ * This file provides /sys/class/ieee80211/<wiphy name>/
+ * and some default attributes.
+ *
+ * Copyright 2005-2006 Jiri Benc <jbenc@suse.cz>
+ * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
+ *
+ * This file is GPLv2 as found in COPYING.
+ */
+
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/nl80211.h>
+#include <linux/rtnetlink.h>
+#include <net/cfg80211.h>
+#include "sysfs.h"
+#include "core.h"
+#include "rdev-ops.h"
+
+static inline struct cfg80211_registered_device *dev_to_rdev(
+ struct device *dev)
+{
+ return container_of(dev, struct cfg80211_registered_device, wiphy.dev);
+}
+
+#define SHOW_FMT(name, fmt, member) \
+static ssize_t name ## _show(struct device *dev, \
+ struct device_attribute *attr, \
+ char *buf) \
+{ \
+ return sprintf(buf, fmt "\n", dev_to_rdev(dev)->member); \
+} \
+static DEVICE_ATTR_RO(name)
+
+SHOW_FMT(index, "%d", wiphy_idx);
+SHOW_FMT(macaddress, "%pM", wiphy.perm_addr);
+SHOW_FMT(address_mask, "%pM", wiphy.addr_mask);
+
+static ssize_t name_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct wiphy *wiphy = &dev_to_rdev(dev)->wiphy;
+
+ return sprintf(buf, "%s\n", wiphy_name(wiphy));
+}
+static DEVICE_ATTR_RO(name);
+
+static ssize_t addresses_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct wiphy *wiphy = &dev_to_rdev(dev)->wiphy;
+ char *start = buf;
+ int i;
+
+ if (!wiphy->addresses)
+ return sprintf(buf, "%pM\n", wiphy->perm_addr);
+
+ for (i = 0; i < wiphy->n_addresses; i++)
+ buf += sprintf(buf, "%pM\n", wiphy->addresses[i].addr);
+
+ return buf - start;
+}
+static DEVICE_ATTR_RO(addresses);
+
+static struct attribute *ieee80211_attrs[] = {
+ &dev_attr_index.attr,
+ &dev_attr_macaddress.attr,
+ &dev_attr_address_mask.attr,
+ &dev_attr_addresses.attr,
+ &dev_attr_name.attr,
+ NULL,
+};
+ATTRIBUTE_GROUPS(ieee80211);
+
+static void wiphy_dev_release(struct device *dev)
+{
+ struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
+
+ cfg80211_dev_free(rdev);
+}
+
+static int wiphy_uevent(struct device *dev, struct kobj_uevent_env *env)
+{
+ /* TODO, we probably need stuff here */
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static void cfg80211_leave_all(struct cfg80211_registered_device *rdev)
+{
+ struct wireless_dev *wdev;
+
+ list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list)
+ cfg80211_leave(rdev, wdev);
+}
+
+static int wiphy_suspend(struct device *dev)
+{
+ struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
+ int ret = 0;
+
+ rdev->suspend_at = ktime_get_boottime_seconds();
+
+ rtnl_lock();
+ if (rdev->wiphy.registered) {
+ if (!rdev->wiphy.wowlan_config) {
+ cfg80211_leave_all(rdev);
+ cfg80211_process_rdev_events(rdev);
+ }
+ if (rdev->ops->suspend)
+ ret = rdev_suspend(rdev, rdev->wiphy.wowlan_config);
+ if (ret == 1) {
+ /* Driver refuse to configure wowlan */
+ cfg80211_leave_all(rdev);
+ cfg80211_process_rdev_events(rdev);
+ ret = rdev_suspend(rdev, NULL);
+ }
+ }
+ rtnl_unlock();
+
+ return ret;
+}
+
+static int wiphy_resume(struct device *dev)
+{
+ struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
+ int ret = 0;
+
+ /* Age scan results with time spent in suspend */
+ cfg80211_bss_age(rdev, ktime_get_boottime_seconds() - rdev->suspend_at);
+
+ rtnl_lock();
+ if (rdev->wiphy.registered && rdev->ops->resume)
+ ret = rdev_resume(rdev);
+ rtnl_unlock();
+
+ return ret;
+}
+
+static SIMPLE_DEV_PM_OPS(wiphy_pm_ops, wiphy_suspend, wiphy_resume);
+#define WIPHY_PM_OPS (&wiphy_pm_ops)
+#else
+#define WIPHY_PM_OPS NULL
+#endif
+
+static const void *wiphy_namespace(struct device *d)
+{
+ struct wiphy *wiphy = container_of(d, struct wiphy, dev);
+
+ return wiphy_net(wiphy);
+}
+
+struct class ieee80211_class = {
+ .name = "ieee80211",
+ .owner = THIS_MODULE,
+ .dev_release = wiphy_dev_release,
+ .dev_groups = ieee80211_groups,
+ .dev_uevent = wiphy_uevent,
+ .pm = WIPHY_PM_OPS,
+ .ns_type = &net_ns_type_operations,
+ .namespace = wiphy_namespace,
+};
+
+int wiphy_sysfs_init(void)
+{
+ return class_register(&ieee80211_class);
+}
+
+void wiphy_sysfs_exit(void)
+{
+ class_unregister(&ieee80211_class);
+}