openwrt-xburst/package/busybox/patches/240-udhcpc_retries.patch

--- a/networking/udhcp/dhcpc.c
+++ b/networking/udhcp/dhcpc.c
@@ -363,7 +363,7 @@ int udhcpc_main(int argc UNUSED_PARAM, c
 
 			switch (state) {
 			case INIT_SELECTING:
-				if (packet_num < discover_retries) {
+				if (!discover_retries || packet_num < discover_retries) {
 					if (packet_num == 0)
 						xid = random_xid();
 
@@ -394,7 +394,7 @@ int udhcpc_main(int argc UNUSED_PARAM, c
 				continue;
 			case RENEW_REQUESTED:
 			case REQUESTING:
-				if (packet_num < discover_retries) {
+				if (!discover_retries || packet_num < discover_retries) {
 					/* send request packet */
 					if (state == RENEW_REQUESTED) /* unicast */
 						send_renew(xid, server_addr, requested_ip);