SKB_DROP_REASON_TCP_CSUM
reason = SKB_DROP_REASON_TCP_CSUM;
reason = SKB_DROP_REASON_TCP_CSUM;
*reason = SKB_DROP_REASON_TCP_CSUM;
drop_reason = SKB_DROP_REASON_TCP_CSUM;
reason = SKB_DROP_REASON_TCP_CSUM;
drop_reason = SKB_DROP_REASON_TCP_CSUM;