From eacd1dacfa17c4cfa62f804d3744554cb477e25a Mon Sep 17 00:00:00 2001
From: Beniamino Galvani <bgalvani@redhat.com>
Date: Mon, 1 Feb 2021 16:32:01 +0100
Subject: [PATCH] device: preserve the DHCPv6 mode when renewing the lease

(cherry picked from commit 14600548158f8159847ba06a3f2f5eef2bb52881)
---
 src/devices/nm-device.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/devices/nm-device.c b/src/devices/nm-device.c
index 4144c2a1b9..de93f2233c 100644
--- a/src/devices/nm-device.c
+++ b/src/devices/nm-device.c
@@ -9862,13 +9862,16 @@ gboolean
 nm_device_dhcp6_renew(NMDevice *self, gboolean release)
 {
     NMDevicePrivate *priv = NM_DEVICE_GET_PRIVATE(self);
+    NMNDiscDHCPLevel mode;
 
     g_return_val_if_fail(priv->dhcp_data_6.client != NULL, FALSE);
 
     _LOGI(LOGD_DHCP6, "DHCPv6 lease renewal requested");
 
     /* Terminate old DHCP instance and release the old lease */
+    mode = priv->dhcp6.mode;
     dhcp6_cleanup(self, CLEANUP_TYPE_DECONFIGURE, release);
+    priv->dhcp6.mode = mode;
 
     /* Start DHCP again on the interface */
     return dhcp6_start(self, FALSE);