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/sungem.c b/drivers/net/sungem.c
index 9e992ca4f543..1c5408f83937 100644
--- a/drivers/net/sungem.c
+++ b/drivers/net/sungem.c
@@ -1004,7 +1004,7 @@ static netdev_tx_t gem_start_xmit(struct sk_buff *skb,
 
         ctrl = 0;
         if (skb->ip_summed == CHECKSUM_PARTIAL) {
-                const u64 csum_start_off = skb_transport_offset(skb);
+                const u64 csum_start_off = skb_checksum_start_offset(skb);
                 const u64 csum_stuff_off = csum_start_off + skb->csum_offset;
 
                 ctrl = (TXDCTRL_CENAB |