net: add skb frag size accessors

To ease skb->truesize sanitization, its better to be able to localize
all references to skb frags size.

Define accessors : skb_frag_size() to fetch frag size, and
skb_frag_size_{set|add|sub}() to manipulate it.

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/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
index 837adbbce77..f9b818267de 100644
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -4268,7 +4268,7 @@ static void igb_tx_map(struct igb_ring *tx_ring,
                         i = 0;
                 }
 
-                size = frag->size;
+                size = skb_frag_size(frag);
                 data_len -= size;
 
                 dma = skb_frag_dma_map(tx_ring->dev, frag, 0,