diff --git a/net/ipv6/exthdrs.c b/net/ipv6/exthdrs.c
index 5be6da2584eec540d38d554b068b0d6ad5ebd910..3b9fa900a4bf73d40be0f86d56c10d160d64ccf6 100644
--- a/net/ipv6/exthdrs.c
+++ b/net/ipv6/exthdrs.c
@@ -459,11 +459,10 @@ static int ipv6_hop_jumbo(struct sk_buff *skb, int optoff)
 		IP6_INC_STATS_BH(IPSTATS_MIB_INTRUNCATEDPKTS);
 		goto drop;
 	}
-	if (pkt_len + sizeof(struct ipv6hdr) < skb->len) {
-		__pskb_trim(skb, pkt_len + sizeof(struct ipv6hdr));
-		if (skb->ip_summed == CHECKSUM_HW)
-			skb->ip_summed = CHECKSUM_NONE;
-	}
+
+	if (pskb_trim_rcsum(skb, pkt_len + sizeof(struct ipv6hdr)))
+		goto drop;
+
 	return 1;
 
 drop:
diff --git a/net/ipv6/reassembly.c b/net/ipv6/reassembly.c
index 9d9e04344c777c8bd331b7b1f5e566fae38351e4..e4fe9ee484ddab3d0f0fee7e0153e8de4f14c4be 100644
--- a/net/ipv6/reassembly.c
+++ b/net/ipv6/reassembly.c
@@ -479,12 +479,9 @@ static void ip6_frag_queue(struct frag_queue *fq, struct sk_buff *skb,
 	/* Point into the IP datagram 'data' part. */
 	if (!pskb_pull(skb, (u8 *) (fhdr + 1) - skb->data))
 		goto err;
-	if (end-offset < skb->len) {
-		if (pskb_trim(skb, end - offset))
-			goto err;
-		if (skb->ip_summed != CHECKSUM_UNNECESSARY)
-			skb->ip_summed = CHECKSUM_NONE;
-	}
+	
+	if (pskb_trim_rcsum(skb, end - offset))
+		goto err;
 
 	/* Find out which fragments are in front and at the back of us
 	 * in the chain of fragments so far.  We must know where to put
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 390d750449ce6f801dd3ed906dd68fa7bcc20126..7cbcaa30cf5e82af47fb8836c321227e0363e9bd 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -483,7 +483,7 @@ static int udpv6_rcv(struct sk_buff **pskb, unsigned int *nhoffp)
 	}
 
 	if (ulen < skb->len) {
-		if (__pskb_trim(skb, ulen))
+		if (pskb_trim_rcsum(skb, ulen))
 			goto discard;
 		saddr = &skb->nh.ipv6h->saddr;
 		daddr = &skb->nh.ipv6h->daddr;