[PATCH -next] amt: Fix NULL but dereferenced coccicheck error

[Yang Li]

Eliminate the following coccicheck warning:
./drivers/net/amt.c:2795:6-9: ERROR: amt is NULL but dereferenced.

Reported-by: Abaci Robot <abaci@xxxxxxxxxxxxxxxxx>
Signed-off-by: Yang Li <yang.lee@xxxxxxxxxxxxxxxxx>
---
 drivers/net/amt.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/amt.c b/drivers/net/amt.c
index 896c9e2..cfd6c8c 100644
--- a/drivers/net/amt.c
+++ b/drivers/net/amt.c
@@ -2766,7 +2766,7 @@ static int amt_err_lookup(struct sock *sk, struct sk_buff *skb)
 	rcu_read_lock_bh();
 	amt = rcu_dereference_sk_user_data(sk);
 	if (!amt)
-		goto drop;
+		goto out;
 
 	if (amt->mode != AMT_MODE_GATEWAY)
 		goto drop;
@@ -2788,6 +2788,7 @@ static int amt_err_lookup(struct sock *sk, struct sk_buff *skb)
 	default:
 		goto drop;
 	}
+out:
 	rcu_read_unlock_bh();
 	return 0;
 drop:
-- 
1.8.3.1