From 504d02038d174ac860035c5bc2df6e97b2c7651c Mon Sep 17 00:00:00 2001
From: Benjamin Valentin <benpicco@googlemail.com>
Date: Tue, 21 Apr 2020 15:50:57 +0200
Subject: [PATCH] gnrc_netif: update PDU after changing PHY mode

---
 sys/net/gnrc/netif/gnrc_netif.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sys/net/gnrc/netif/gnrc_netif.c b/sys/net/gnrc/netif/gnrc_netif.c
index 428c1e2711..597b6ff61d 100644
--- a/sys/net/gnrc/netif/gnrc_netif.c
+++ b/sys/net/gnrc/netif/gnrc_netif.c
@@ -363,6 +363,9 @@ int gnrc_netif_set_from_netdev(gnrc_netif_t *netif,
                 case NETOPT_SRC_LEN:
                     _update_l2addr_from_dev(netif);
                     break;
+                case NETOPT_IEEE802154_PHY:
+                    gnrc_netif_ipv6_init_mtu(netif);
+                    break;
                 case NETOPT_STATE:
                     if (*((netopt_state_t *)opt->data) == NETOPT_STATE_RESET) {
                         _configure_netdev(netif->dev);