From: Alexander Aring Date: Mon, 11 Apr 2016 09:04:16 +0000 (+0200) Subject: nl802154: avoid address change while running lowpan X-Git-Tag: v4.7-rc1~154^2~200^2~17 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=9e3b71f3436415f917eb569cde792b223cceebc0;p=karo-tx-linux.git 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 --- 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])