diff mbox

[net-next] af_mpls: fix undefined reference to ip6_route_output

Message ID 1437606648-6789-1-git-send-email-roopa@cumulusnetworks.com
State Changes Requested, archived
Delegated to: David Miller
Headers show

Commit Message

Roopa Prabhu July 22, 2015, 11:10 p.m. UTC 
From: Roopa Prabhu <roopa@cumulusnetworks.com>

seen with CONFIG_IPV6 disabled. Wrap the code around
IS_BUILTIN(CONFIG_IPV6). Also fixes undefined reference
to ip_route_output with CONFIG_INET=n

Reported-by: kbuild test robot <fengguang.wu@intel.com>
Reported-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>
---
could not think of a better way. This uses IS_BUILTIN instead
of IS_ENABLED to avoid the case where CONFIG_IPV6=m.
I am not sure if this could confuse the user.

 net/mpls/af_mpls.c |   19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)
diff mbox

Patch

diff --git a/net/mpls/af_mpls.c b/net/mpls/af_mpls.c
index 49f1b0e..71dbc4b 100644
--- a/net/mpls/af_mpls.c
+++ b/net/mpls/af_mpls.c
@@ -331,6 +331,7 @@  static unsigned find_free_label(struct net *net)
 	return LABEL_NOT_SPECIFIED;
 }
 
+#if IS_ENABLED(CONFIG_INET)
 static struct net_device *inet_fib_lookup_dev(struct net *net, void *addr)
 {
 	struct net_device *dev = NULL;
@@ -350,7 +351,14 @@  static struct net_device *inet_fib_lookup_dev(struct net *net, void *addr)
 errout:
 	return dev;
 }
+#else
+static struct net_device *inet_fib_lookup_dev(struct net *net, void *addr)
+{
+	return ERR_PTR(-EAFNOSUPPORT);
+}
+#endif
 
+#if IS_BUILTIN(CONFIG_IPV6)
 static struct net_device *inet6_fib_lookup_dev(struct net *net, void *addr)
 {
 	struct net_device *dev = NULL;
@@ -371,6 +379,12 @@  errout:
 
 	return dev;
 }
+#else
+static struct net_device *inet6_fib_lookup_dev(struct net *net, void *addr)
+{
+	return ERR_PTR(-EAFNOSUPPORT);
+}
+#endif
 
 static struct net_device *find_outdev(struct net *net,
 				      struct mpls_route_config *cfg)
@@ -427,8 +441,11 @@  static int mpls_route_add(struct mpls_route_config *cfg)
 
 	err = -ENODEV;
 	dev = find_outdev(net, cfg);
-	if (!dev)
+	if (IS_ERR(dev)) {
+		err = PTR_ERR(dev);
+		dev = NULL;
 		goto errout;
+	}
 
 	/* Ensure this is a supported device */
 	err = -EINVAL;