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, 3 insertions, 3 deletions

diff --git a/drivers/net/ethernet/tundra/tsi108_eth.c b/drivers/net/ethernet/tundra/tsi108_eth.c
index a03996cf88ed..a8df7eca0956 100644
--- a/drivers/net/ethernet/tundra/tsi108_eth.c
+++ b/drivers/net/ethernet/tundra/tsi108_eth.c
@@ -709,13 +709,13 @@ static int tsi108_send_packet(struct sk_buff * skb, struct net_device *dev)
                         data->txring[tx].len = skb_headlen(skb);
                         misc |= TSI108_TX_SOF;
                 } else {
-                        skb_frag_t *frag = &skb_shinfo(skb)->frags[i - 1];
+                        const skb_frag_t *frag = &skb_shinfo(skb)->frags[i - 1];
 
                         data->txring[tx].buf0 = skb_frag_dma_map(NULL, frag,
                                                                  0,
-                                                                 frag->size,
+                                                                 skb_frag_size(frag),
                                                                  DMA_TO_DEVICE);
-                        data->txring[tx].len = frag->size;
+                        data->txring[tx].len = skb_frag_size(frag);
                 }
 
                 if (i == frags - 1)