AX25_KISS_HEADER_LEN
dev->hard_header_len = AX25_KISS_HEADER_LEN +
dev->hard_header_len = AX25_KISS_HEADER_LEN +
skb_pull(skb, AX25_KISS_HEADER_LEN); /* Remove the KISS byte */
skb_pull(skb, AX25_KISS_HEADER_LEN);