nl802154: avoid address change while running lowpan
The generation of autoconfigured IPv6 link-local addresses starts with a
notification on interface up.
To handle autoconfiguration according to RFC 4944 requires pan id and
short address to generate an autoconfigured link-local address. This
patch will avoid changing of these link-layer address configuration
while lowpan interface is up.
Reviewed-by: Stefan Schmidt <stefan@osg.samsung.com>
Signed-off-by: Alexander Aring <aar@pengutronix.de>
Acked-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
diff --git a/net/ieee802154/nl802154.c b/net/ieee802154/nl802154.c
index 16ef0d9..5f1dc4b 100644
--- a/net/ieee802154/nl802154.c
+++ b/net/ieee802154/nl802154.c
@@ -1074,6 +1074,11 @@
if (netif_running(dev))
return -EBUSY;
+ if (wpan_dev->lowpan_dev) {
+ if (netif_running(wpan_dev->lowpan_dev))
+ return -EBUSY;
+ }
+
/* don't change address fields on monitor */
if (wpan_dev->iftype == NL802154_IFTYPE_MONITOR ||
!info->attrs[NL802154_ATTR_PAN_ID])
@@ -1105,6 +1110,11 @@
if (netif_running(dev))
return -EBUSY;
+ if (wpan_dev->lowpan_dev) {
+ if (netif_running(wpan_dev->lowpan_dev))
+ return -EBUSY;
+ }
+
/* don't change address fields on monitor */
if (wpan_dev->iftype == NL802154_IFTYPE_MONITOR ||
!info->attrs[NL802154_ATTR_SHORT_ADDR])