+++ /dev/null
---- a/net/wireless/sysfs.c
-+++ b/net/wireless/sysfs.c
-@@ -24,18 +24,35 @@ static inline struct cfg80211_registered
- return container_of(dev, struct cfg80211_registered_device, wiphy.dev);
- }
-
--#define SHOW_FMT(name, fmt, member) \
-+#define SHOW_FMT(name, fmt, member, mode) \
- 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)
-+static DEVICE_ATTR_##mode(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 macaddress_store(struct device *dev,
-+ struct device_attribute *attr,
-+ const char *buf, size_t len)
-+{
-+ u8 mac[ETH_ALEN];
-+
-+ if (!mac_pton(buf, mac))
-+ return -EINVAL;
-+
-+ if (buf[3 * ETH_ALEN - 1] && buf[3 * ETH_ALEN - 1] != '\n')
-+ return -EINVAL;
-+
-+ memcpy(dev_to_rdev(dev)->wiphy.perm_addr, mac, ETH_ALEN);
-+
-+ return strnlen(buf, len);
-+}
-+
-+SHOW_FMT(index, "%d", wiphy_idx, RO);
-+SHOW_FMT(macaddress, "%pM", wiphy.perm_addr, RW);
-+SHOW_FMT(address_mask, "%pM", wiphy.addr_mask, RO);
-
- static ssize_t name_show(struct device *dev,
- struct device_attribute *attr,