[PATCH RFC 3/5] net: ipv6: Skip in6_dev initialization for IFF_L2_ONLY interfaces

[Florian Fainelli <f.fainelli@gmail.com>]

IFF_L2_ONLY interfaces are Layer-2 only network devices and do not
support configuration of IPv6 addresses, nor the full IPv6 protocol
stack. Do nothing for these interfaces.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
---
 net/ipv6/addrconf.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 0f08d3b9e238..0365b5ffe339 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -3161,6 +3161,9 @@ static int addrconf_notify(struct notifier_block *this, unsigned long event,
 	int run_pending = 0;
 	int err;
 
+	if (dev->flags & IFF_L2_ONLY)
+		goto out;
+
 	switch (event) {
 	case NETDEV_REGISTER:
 		if (!idev && dev->mtu >= IPV6_MIN_MTU) {
@@ -3304,6 +3307,7 @@ static int addrconf_notify(struct notifier_block *this, unsigned long event,
 		addrconf_type_change(dev, event);
 		break;
 	}
+out:
 
 	return NOTIFY_OK;
 }
-- 
2.1.0