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, 2 insertions, 2 deletions

diff --git a/drivers/net/ixgb/ixgb_main.c b/drivers/net/ixgb/ixgb_main.c
index 33c4ffe6e103..c2f6e71e1181 100644
--- a/drivers/net/ixgb/ixgb_main.c
+++ b/drivers/net/ixgb/ixgb_main.c
@@ -1905,7 +1905,7 @@ ixgb_rx_checksum(struct ixgb_adapter *adapter,
          */
         if ((rx_desc->status & IXGB_RX_DESC_STATUS_IXSM) ||
            (!(rx_desc->status & IXGB_RX_DESC_STATUS_TCPCS))) {
-                skb->ip_summed = CHECKSUM_NONE;
+                skb_checksum_none_assert(skb);
                 return;
         }
 
@@ -1913,7 +1913,7 @@ ixgb_rx_checksum(struct ixgb_adapter *adapter,
         /* now look at the TCP checksum error bit */
         if (rx_desc->errors & IXGB_RX_DESC_ERRORS_TCPE) {
                 /* let the stack verify checksum errors */
-                skb->ip_summed = CHECKSUM_NONE;
+                skb_checksum_none_assert(skb);
                 adapter->hw_csum_rx_error++;
         } else {
                 /* TCP checksum is good */