drivers/net: avoid some skb->ip_summed initializations

fresh skbs have ip_summed set to CHECKSUM_NONE (0)

We can avoid setting again skb->ip_summed to CHECKSUM_NONE in drivers.

Introduce skb_checksum_none_assert() helper so that we keep this
assertion documented in driver sources.

Change most occurrences of :

skb->ip_summed = CHECKSUM_NONE;

by :

skb_checksum_none_assert(skb);

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 3 deletions

diff --git a/drivers/net/ipg.c b/drivers/net/ipg.c
index 72e3d2da9e9f..dc0198092343 100644
--- a/drivers/net/ipg.c
+++ b/drivers/net/ipg.c
@@ -1213,7 +1213,7 @@ static void ipg_nic_rx_with_start_and_end(struct net_device *dev,
 
         skb_put(skb, framelen);
         skb->protocol = eth_type_trans(skb, dev);
-        skb->ip_summed = CHECKSUM_NONE;
+        skb_checksum_none_assert(skb);
         netif_rx(skb);
         sp->rx_buff[entry] = NULL;
 }
@@ -1278,7 +1278,7 @@ static void ipg_nic_rx_with_end(struct net_device *dev,
                                 jumbo->skb->protocol =
                                     eth_type_trans(jumbo->skb, dev);
 
-                                jumbo->skb->ip_summed = CHECKSUM_NONE;
+                                skb_checksum_none_assert(jumbo->skb);
                                 netif_rx(jumbo->skb);
                         }
                 }
@@ -1476,7 +1476,7 @@ static int ipg_nic_rx(struct net_device *dev)
                          * IP/TCP/UDP frame was received. Let the
                          * upper layer decide.
                          */
-                        skb->ip_summed = CHECKSUM_NONE;
+                        skb_checksum_none_assert(skb);
 
                         /* Hand off frame for higher layer processing.
                          * The function netif_rx() releases the sk_buff