[NETNS][IPV6]: Make ipv6_sysctl_register to return a value.

This patch makes the function ipv6_sysctl_register to return a
value. The af_inet6 init function is now able to handle an error and
catch it from the initialization of the sysctl.

Signed-off-by: Daniel Lezcano <dlezcano@fr.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 7 insertions, 2 deletions

diff --git a/net/ipv6/sysctl_net_ipv6.c b/net/ipv6/sysctl_net_ipv6.c
index 4ad8d9d3cb7a..f713fbf34c23 100644
--- a/net/ipv6/sysctl_net_ipv6.c
+++ b/net/ipv6/sysctl_net_ipv6.c
@@ -91,10 +91,15 @@ EXPORT_SYMBOL_GPL(net_ipv6_ctl_path);
 
 static struct ctl_table_header *ipv6_sysctl_header;
 
-void ipv6_sysctl_register(void)
+int ipv6_sysctl_register(void)
 {
         ipv6_sysctl_header = register_sysctl_paths(net_ipv6_ctl_path,
-                        ipv6_table);
+                                                   ipv6_table);
+        if (!ipv6_sysctl_header)
+                return -ENOMEM;
+
+        return 0;
+
 }
 
 void ipv6_sysctl_unregister(void)