From 9e3b71f3436415f917eb569cde792b223cceebc0 Mon Sep 17 00:00:00 2001 From: Alexander Aring Date: Mon, 11 Apr 2016 11:04:16 +0200 Subject: 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 Signed-off-by: Alexander Aring Acked-by: Jukka Rissanen Signed-off-by: Marcel Holtmann --- net/ieee802154/nl802154.c | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'net/ieee802154/nl802154.c') diff --git a/net/ieee802154/nl802154.c b/net/ieee802154/nl802154.c index 16ef0d9f566e..5f1dc4bfeed5 100644 --- a/net/ieee802154/nl802154.c +++ b/net/ieee802154/nl802154.c @@ -1074,6 +1074,11 @@ static int nl802154_set_pan_id(struct sk_buff *skb, struct genl_info *info) 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 @@ static int nl802154_set_short_addr(struct sk_buff *skb, struct genl_info *info) 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]) -- cgit v1.2.1