ipv6: Fix BUG when disabled ipv6 module is unloaded

Do not try to "uninitialize" ipv6 if its initialization had been skipped
because module parameter disable=1 had been specified.

Reported-by:  Thomas Backlund <tmb@mandriva.org>
Signed-off-by: John Dykstra <john.dykstra1@gmail.com>
Acked-by: Brian Haley <brian.haley@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c
index da944eca2ca654423f4f00405069a58914fe81e0..9c8309ed35cf32351517af43ad647f16442cd9e9 100644 (file)
--- a/net/ipv6/af_inet6.c
+++ b/net/ipv6/af_inet6.c
@@ -1192,6 +1192,9 @@ module_init(inet6_init);
 
 static void __exit inet6_exit(void)
 {
+       if (disable_ipv6)
+               return;
+
        /* First of all disallow new sockets creation. */
        sock_unregister(PF_INET6);
        /* Disallow any further netlink messages */