[IPV6]: Make fib6_init to return an error code.

If there is an error in the initialization function, nothing is
followed up to the caller. So I add a return value to be set for the
init function.

Signed-off-by: Daniel Lezcano <dlezcano@fr.ibm.com>
Acked-by: Benjamin Thery <benjamin.thery@bull.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 12 insertions, 4 deletions

diff --git a/include/net/ip6_fib.h b/include/net/ip6_fib.h
index 4cefcffe773e..5d39ce92afcf 100644
--- a/include/net/ip6_fib.h
+++ b/include/net/ip6_fib.h
@@ -224,7 +224,7 @@ extern void			fib6_run_gc(unsigned long dummy);
 
 extern void                     fib6_gc_cleanup(void);
 
-extern void                     fib6_init(void);
+extern int                      fib6_init(void);
 
 extern void                     fib6_rules_init(void);
 extern void                     fib6_rules_cleanup(void);
diff --git a/net/ipv6/ip6_fib.c b/net/ipv6/ip6_fib.c
index 31b60a02512a..c100b44f2b87 100644
--- a/net/ipv6/ip6_fib.c
+++ b/net/ipv6/ip6_fib.c
@@ -1473,16 +1473,24 @@ void fib6_run_gc(unsigned long dummy)
         spin_unlock_bh(&fib6_gc_lock);
 }
 
-void __init fib6_init(void)
+int __init fib6_init(void)
 {
+        int ret;
         fib6_node_kmem = kmem_cache_create("fib6_nodes",
                                            sizeof(struct fib6_node),
                                            0, SLAB_HWCACHE_ALIGN|SLAB_PANIC,
                                            NULL);
-
         fib6_tables_init();
 
-        __rtnl_register(PF_INET6, RTM_GETROUTE, NULL, inet6_dump_fib);
+        ret = __rtnl_register(PF_INET6, RTM_GETROUTE, NULL, inet6_dump_fib);
+        if (ret)
+                goto out_kmem_cache_create;
+out:
+        return ret;
+
+out_kmem_cache_create:
+        kmem_cache_destroy(fib6_node_kmem);
+        goto out;
 }
 
 void fib6_gc_cleanup(void)