[IPV6]: make frag to return an error at initialization

This patch makes the frag_init to return an error code, so the af_inet6
module can handle the error.

Signed-off-by: Daniel Lezcano <dlezcano@fr.ibm.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 442c298..a75c4bc 100644
--- a/net/ipv6/af_inet6.c
+++ b/net/ipv6/af_inet6.c
@@ -863,7 +863,9 @@
 	if (err)
 		goto ipv6_exthdrs_fail;
 
-	ipv6_frag_init();
+	err = ipv6_frag_init();
+	if (err)
+		goto ipv6_frag_fail;
 
 	/* Init v6 transport protocols. */
 	udpv6_init();
@@ -875,6 +877,8 @@
 out:
 	return err;
 
+ipv6_frag_fail:
+	ipv6_exthdrs_exit();
 ipv6_exthdrs_fail:
 	addrconf_cleanup();
 addrconf_fail:
@@ -934,7 +938,7 @@
 
 	/* Cleanup code parts. */
 	ipv6_packet_cleanup();
-
+	ipv6_frag_exit();
 	ipv6_exthdrs_exit();
 	addrconf_cleanup();
 	ip6_flowlabel_cleanup();