Avalon driver is missing the drv_id.
diff --git a/driver-avalon.c b/driver-avalon.c
index dd762b8..f1d8101 100644
--- a/driver-avalon.c
+++ b/driver-avalon.c
@@ -995,6 +995,7 @@ static void avalon_shutdown(struct thr_info *thr)
}
struct device_drv avalon_drv = {
+ .drv_id = DRIVER_AVALON,
.dname = "avalon",
.name = "AVA",
.drv_detect = avalon_detect,