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, 1 insertions, 1 deletions

diff --git a/drivers/net/stmmac/stmmac_main.c b/drivers/net/stmmac/stmmac_main.c
index e3f002eba89a..1ccea76d89ae 100644
--- a/drivers/net/stmmac/stmmac_main.c
+++ b/drivers/net/stmmac/stmmac_main.c
@@ -1256,7 +1256,7 @@ static int stmmac_rx(struct stmmac_priv *priv, int limit)
 
                         if (unlikely(status == csum_none)) {
                                 /* always for the old mac 10/100 */
-                                skb->ip_summed = CHECKSUM_NONE;
+                                skb_checksum_none_assert(skb);
                                 netif_receive_skb(skb);
                         } else {
                                 skb->ip_summed = CHECKSUM_UNNECESSARY;