netdev - [PATCH RFC 2/5] net: ipv4: Skip in_dev initialization for IFF_L2

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Date:	Tue, 25 Aug 2015 15:50:12 -0700
From:	Florian Fainelli <f.fainelli@...il.com>
To:	netdev@...r.kernel.org
Cc:	davem@...emloft.net, andrew@...n.ch, linux@...ck-us.net,
	jiri@...nulli.us, sfeldma@...il.com,
	Florian Fainelli <f.fainelli@...il.com>
Subject: [PATCH RFC 2/5] net: ipv4: Skip in_dev initialization for IFF_L2_ONLY interfaces

IFF_L2_ONLY interfaces are Layer-2 only and do not support configuration
of IPv4 addresses, nor the full IPv4 protocol stack. Do nothing for
these interfaces.

Signed-off-by: Florian Fainelli <f.fainelli@...il.com>
---
 net/ipv4/devinet.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c
index 2d9cb1748f81..30068754e821 100644
--- a/net/ipv4/devinet.c
+++ b/net/ipv4/devinet.c
@@ -1383,6 +1383,9 @@ static int inetdev_event(struct notifier_block *this, unsigned long event,
 	ASSERT_RTNL();
 
 	if (!in_dev) {
+		if (dev->flags & IFF_L2_ONLY)
+			goto out;
+
 		if (event == NETDEV_REGISTER) {
 			in_dev = inetdev_init(dev);
 			if (IS_ERR(in_dev))
-- 
2.1.0

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