sdata = IEEE80211_DEV_TO_SUB_IF(dev);
- sprintf(buf, "netdev:%s", dev->name);
dir = sdata->debugfsdir;
+
+ if (!dir)
+ return 0;
+
+ sprintf(buf, "netdev:%s", dev->name);
if (!debugfs_rename(dir->d_parent, dir, dir->d_parent, buf))
printk(KERN_ERR "mac80211: debugfs: failed to rename debugfs "
"dir to %s\n", buf);