+ dev->id = ++swdev_id;
+
+ list_for_each_entry(sdev, &swdevs, dev_list) {
+ if (!sscanf(sdev->devname, SWCONFIG_DEVNAME, &i))
+ continue;
+ if (i < 0 || i > max_switches)
+ continue;
+
+ set_bit(i, &in_use);
+ }
+ i = find_first_zero_bit(&in_use, max_switches);
+
+ if (i == max_switches)
+ return -ENFILE;
+
+ /* fill device name */
+ snprintf(dev->devname, IFNAMSIZ, SWCONFIG_DEVNAME, i);
+