From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from metis.ext.4.pengutronix.de ([92.198.50.35]:56074 "EHLO metis.ext.4.pengutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757416AbcDGSyd (ORCPT ); Thu, 7 Apr 2016 14:54:33 -0400 From: Alexander Aring Subject: [RFCv2 bluetooth-next 03/21] nl802154: avoid address change while running lowpan Date: Thu, 7 Apr 2016 20:54:04 +0200 Message-Id: <1460055262-4330-4-git-send-email-aar@pengutronix.de> In-Reply-To: <1460055262-4330-1-git-send-email-aar@pengutronix.de> References: <1460055262-4330-1-git-send-email-aar@pengutronix.de> Sender: linux-wpan-owner@vger.kernel.org List-ID: To: linux-wpan@vger.kernel.org Cc: kernel@pengutronix.de, jukka.rissanen@linux.intel.com, hannes@stressinduktion.org, stefan@osg.samsung.com, mcr@sandelman.ca, werner@almesberger.net, Alexander Aring 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 --- net/ieee802154/nl802154.c | 10 ++++++++++ 1 file changed, 10 insertions(+) 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 @@ 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]) -- 2.8.0