diff mbox

[bluetooth-next,03/11] nl802154: avoid address change while running lowpan

Message ID 1460365464-12435-4-git-send-email-aar@pengutronix.de (mailing list archive)
State Accepted
Headers show

Commit Message

Alexander Aring April 11, 2016, 9:04 a.m. UTC 
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>
---
 net/ieee802154/nl802154.c | 10 ++++++++++
 1 file changed, 10 insertions(+)
diff mbox

Patch

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])