Commit 0f6938eb authored by Christophe Leroy's avatar Christophe Leroy Committed by David S. Miller
Browse files

net: core: Use csum_replace_by_diff() and csum_sub() instead of opencoding 



Open coded calculation can be avoided and replaced by the
equivalent csum_replace_by_diff() and csum_sub().

Signed-off-by: default avatarChristophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent adfb62db

net/core/utils.c

+2 −2
Original line number Diff line number Diff line
@@ -476,9 +476,9 @@ void inet_proto_csum_replace_by_diff(__sum16 *sum, struct sk_buff *skb, 
				     __wsum diff, bool pseudohdr)

{

	if (skb->ip_summed != CHECKSUM_PARTIAL) {

		*sum = csum_fold(csum_add(diff, ~csum_unfold(*sum)));

		csum_replace_by_diff(sum, diff);

		if (skb->ip_summed == CHECKSUM_COMPLETE && pseudohdr)

			skb->csum = ~csum_add(diff, ~skb->csum);

			skb->csum = ~csum_sub(diff, skb->csum);

	} else if (pseudohdr) {

		*sum = ~csum_fold(csum_add(diff, csum_unfold(*sum)));

	}