[PATCH net] sit: use ipv6_mod_enabled to check if ipv6 is disabled

[Hangbin Liu]

ipv6_mod_enabled() is more safe and gentle to check if ipv6 is disabled
at running time.

Fixes: 173656accaf5 ("sit: check if IPv6 enabled before calling 
ip6_err_gen_icmpv6_unreach()")
Signed-off-by: Hangbin Liu <liuhang...@gmail.com>
---
 net/ipv6/sit.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c
index e8a1dabef803..eea1f19985a7 100644
--- a/net/ipv6/sit.c
+++ b/net/ipv6/sit.c
@@ -546,7 +546,7 @@ static int ipip6_err(struct sk_buff *skb, u32 info)
        }
 
        err = 0;
-       if (__in6_dev_get(skb->dev) &&
+       if (ipv6_mod_enabled() &&
            !ip6_err_gen_icmpv6_unreach(skb, iph->ihl * 4, type, data_len))
                goto out;
 
-- 
2.19.2