[PATCH net-next v2 04/14] net: stmmac: add stmmac_tso_header_size()

["Russell King (Oracle)" <rmk+kernel@armlinux.org.uk>]

We will need to compute the size of the protocol headers in two places,
so move this into a separate function.

Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
---
 .../net/ethernet/stmicro/stmmac/stmmac_main.c | 20 ++++++++++++++-----
 1 file changed, 15 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 890a1efb8733..2b5bccc727a5 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -4373,6 +4373,18 @@ static void stmmac_flush_tx_descriptors(struct stmmac_priv *priv, int queue)
 	stmmac_set_queue_tx_tail_ptr(priv, tx_q, queue, tx_q->cur_tx);
 }
 
+static size_t stmmac_tso_header_size(struct sk_buff *skb)
+{
+	size_t size;
+
+	if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP_L4)
+		size = skb_transport_offset(skb) + sizeof(struct udphdr);
+	else
+		size = skb_tcp_all_headers(skb);
+
+	return size;
+}
+
 /**
  *  stmmac_tso_xmit - Tx entry point of the driver for oversized frames (TSO)
  *  @skb : the socket buffer
@@ -4444,13 +4456,11 @@ static netdev_tx_t stmmac_tso_xmit(struct sk_buff *skb, struct net_device *dev)
 	first_tx = tx_q->cur_tx;
 
 	/* Compute header lengths */
-	if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP_L4) {
-		proto_hdr_len = skb_transport_offset(skb) + sizeof(struct udphdr);
+	proto_hdr_len = stmmac_tso_header_size(skb);
+	if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP_L4)
 		hdr = sizeof(struct udphdr);
-	} else {
-		proto_hdr_len = skb_tcp_all_headers(skb);
+	else
 		hdr = tcp_hdrlen(skb);
-	}
 
 	/* Desc availability based on threshold should be enough safe */
 	if (unlikely(stmmac_tx_avail(priv, queue) <
-- 
2.47.3