netdev - [patch net-next v4 1/9] openvswitch: actions: use skb_postpull

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Message-Id: <1416402303-25341-2-git-send-email-jiri@resnulli.us>
Date:	Wed, 19 Nov 2014 14:04:55 +0100
From:	Jiri Pirko <jiri@...nulli.us>
To:	netdev@...r.kernel.org
Cc:	davem@...emloft.net, jhs@...atatu.com, pshelar@...ira.com,
	therbert@...gle.com, edumazet@...gle.com, willemb@...gle.com,
	dborkman@...hat.com, mst@...hat.com, fw@...len.de,
	Paul.Durrant@...rix.com, tgraf@...g.ch, cwang@...pensource.com
Subject: [patch net-next v4 1/9] openvswitch: actions: use skb_postpull_rcsum when possible

Replace duplicated code by calling skb_postpull_rcsum

Suggested-by: Eric Dumazet <eric.dumazet@...il.com>
Signed-off-by: Jiri Pirko <jiri@...nulli.us>
Acked-by: Pravin B Shelar <pshelar@...ira.com>
---
 net/openvswitch/actions.c | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/net/openvswitch/actions.c b/net/openvswitch/actions.c
index 394efa6..749a301 100644
--- a/net/openvswitch/actions.c
+++ b/net/openvswitch/actions.c
@@ -175,10 +175,7 @@ static int pop_mpls(struct sk_buff *skb, struct sw_flow_key *key,
 	if (unlikely(err))
 		return err;
 
-	if (skb->ip_summed == CHECKSUM_COMPLETE)
-		skb->csum = csum_sub(skb->csum,
-				     csum_partial(skb_mpls_header(skb),
-						  MPLS_HLEN, 0));
+	skb_postpull_rcsum(skb, skb_mpls_header(skb), MPLS_HLEN);
 
 	memmove(skb_mac_header(skb) + MPLS_HLEN, skb_mac_header(skb),
 		skb->mac_len);
@@ -230,9 +227,7 @@ static int __pop_vlan_tci(struct sk_buff *skb, __be16 *current_tci)
 	if (unlikely(err))
 		return err;
 
-	if (skb->ip_summed == CHECKSUM_COMPLETE)
-		skb->csum = csum_sub(skb->csum, csum_partial(skb->data
-					+ (2 * ETH_ALEN), VLAN_HLEN, 0));
+	skb_postpull_rcsum(skb, skb->data + (2 * ETH_ALEN), VLAN_HLEN);
 
 	vhdr = (struct vlan_hdr *)(skb->data + ETH_HLEN);
 	*current_tci = vhdr->h_vlan_TCI;
-- 
1.9.3

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