net: Fix drivers advertising HW_CSUM feature to use csum_start

Some drivers are using skb_transport_offset(skb) instead of skb->csum_start
for NETIF_F_HW_CSUM offload.  This does not matter now, but if someone
implements checksumming of encapsulated packets then this will break silently.

TSO output paths are left as they are, since they are for IP+TCP only
(might be worth converting though).

Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/net/atl1c/atl1c_main.c b/drivers/net/atl1c/atl1c_main.c
index 09b099bfab2b..e48ea956c51f 100644
--- a/drivers/net/atl1c/atl1c_main.c
+++ b/drivers/net/atl1c/atl1c_main.c
@@ -2078,7 +2078,7 @@ static int atl1c_tso_csum(struct atl1c_adapter *adapter,
 check_sum:
         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
                 u8 css, cso;
-                cso = skb_transport_offset(skb);
+                cso = skb_checksum_start_offset(skb);
 
                 if (unlikely(cso & 0x1)) {
                         if (netif_msg_tx_err(adapter))