From: Jiri Pirko <jiri@resnulli.us>
Date: Wed, 19 Nov 2014 13:04:55 +0000 (+0100)
Subject: openvswitch: actions: use skb_postpull_rcsum when possible
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=1abcd82c20e7cbfd2b89d834b24ff68feae158ec;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

openvswitch: actions: use skb_postpull_rcsum when possible

Replace duplicated code by calling skb_postpull_rcsum

Suggested-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Acked-by: Pravin B Shelar <pshelar@nicira.com>
Acked-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/openvswitch/actions.c b/net/openvswitch/actions.c
index 394efa67934e..749a30163071 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;