mac802154: rx: add CHECKSUM_UNNECESSARY

This patch adds CHECKSUM_UNNECESSARY to skb->ip_summed before delivery.
There exist no transceiver with IP checksum functionality.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

net/mac802154/rx.c

@@ -31,6 +31,7 @@
 
 static int mac802154_process_data(struct net_device *dev, struct sk_buff *skb)
 {
+	skb->ip_summed = CHECKSUM_UNNECESSARY;
 	skb->protocol = htons(ETH_P_IEEE802154);
 
 	return netif_receive_skb(skb);
@@ -226,6 +227,7 @@ mac802154_monitors_rx(struct ieee802154_local *local, struct sk_buff *skb)
 	u16 crc = crc_ccitt(0, skb->data, skb->len);
 	u8 *data;
 
+	skb->ip_summed = CHECKSUM_UNNECESSARY;
 	skb->protocol = htons(ETH_P_IEEE802154);
 
 	rcu_read_lock();