Merge upstream into ieee80211.

Hand-fix merge conflict in drivers/usb/net/zd1201.c.

3 files changed, 20 insertions, 11 deletions

diff --git a/net/ipv4/netfilter/ip_queue.c b/net/ipv4/netfilter/ip_queue.c
index eda1fba431a..c6baa817438 100644
--- a/net/ipv4/netfilter/ip_queue.c
+++ b/net/ipv4/netfilter/ip_queue.c
@@ -214,6 +214,12 @@ ipq_build_packet_message(struct ipq_queue_entry *entry, int *errp)
 		break;
 	
 	case IPQ_COPY_PACKET:
+		if (entry->skb->ip_summed == CHECKSUM_HW &&
+		    (*errp = skb_checksum_help(entry->skb,
+		                               entry->info->outdev == NULL))) {
+			read_unlock_bh(&queue_lock);
+			return NULL;
+		}
 		if (copy_range == 0 || copy_range > entry->skb->len)
 			data_len = entry->skb->len;
 		else
@@ -385,6 +391,7 @@ ipq_mangle_ipv4(ipq_verdict_msg_t *v, struct ipq_queue_entry *e)
 	if (!skb_ip_make_writable(&e->skb, v->data_len))
 		return -ENOMEM;
 	memcpy(e->skb->data, v->payload, v->data_len);
+	e->skb->ip_summed = CHECKSUM_NONE;
 	e->skb->nfcache |= NFC_ALTERED;
 
 	/*
diff --git a/net/ipv4/netfilter/ipt_ECN.c b/net/ipv4/netfilter/ipt_ECN.c
index ada9911118e..94a0ce1c1c9 100644
--- a/net/ipv4/netfilter/ipt_ECN.c
+++ b/net/ipv4/netfilter/ipt_ECN.c
@@ -61,16 +61,20 @@ set_ect_tcp(struct sk_buff **pskb, const struct ipt_ECN_info *einfo, int inward)
 	if (!tcph)
 		return 0;
 
-	if (!(einfo->operation & IPT_ECN_OP_SET_ECE
-	      || tcph->ece == einfo->proto.tcp.ece)
-	    && (!(einfo->operation & IPT_ECN_OP_SET_CWR
-		  || tcph->cwr == einfo->proto.tcp.cwr)))
+	if ((!(einfo->operation & IPT_ECN_OP_SET_ECE) ||
+	     tcph->ece == einfo->proto.tcp.ece) &&
+	    ((!(einfo->operation & IPT_ECN_OP_SET_CWR) ||
+	     tcph->cwr == einfo->proto.tcp.cwr)))
 		return 1;
 
 	if (!skb_ip_make_writable(pskb, (*pskb)->nh.iph->ihl*4+sizeof(*tcph)))
 		return 0;
 	tcph = (void *)(*pskb)->nh.iph + (*pskb)->nh.iph->ihl*4;
 
+	if ((*pskb)->ip_summed == CHECKSUM_HW &&
+	    skb_checksum_help(*pskb, inward))
+		return 0;
+
 	diffs[0] = ((u_int16_t *)tcph)[6];
 	if (einfo->operation & IPT_ECN_OP_SET_ECE)
 		tcph->ece = einfo->proto.tcp.ece;
@@ -79,13 +83,10 @@ set_ect_tcp(struct sk_buff **pskb, const struct ipt_ECN_info *einfo, int inward)
 	diffs[1] = ((u_int16_t *)tcph)[6];
 	diffs[0] = diffs[0] ^ 0xFFFF;
 
-	if ((*pskb)->ip_summed != CHECKSUM_HW)
+	if ((*pskb)->ip_summed != CHECKSUM_UNNECESSARY)
 		tcph->check = csum_fold(csum_partial((char *)diffs,
 						     sizeof(diffs),
 						     tcph->check^0xFFFF));
-	else
-		if (skb_checksum_help(*pskb, inward))
-			return 0;
 	(*pskb)->nfcache |= NFC_ALTERED;
 	return 1;
 }
diff --git a/net/ipv4/netfilter/ipt_TCPMSS.c b/net/ipv4/netfilter/ipt_TCPMSS.c
index 1049050b2bf..7b84a254440 100644
--- a/net/ipv4/netfilter/ipt_TCPMSS.c
+++ b/net/ipv4/netfilter/ipt_TCPMSS.c
@@ -61,6 +61,10 @@ ipt_tcpmss_target(struct sk_buff **pskb,
 	if (!skb_ip_make_writable(pskb, (*pskb)->len))
 		return NF_DROP;
 
+	if ((*pskb)->ip_summed == CHECKSUM_HW &&
+	    skb_checksum_help(*pskb, out == NULL))
+		return NF_DROP;
+
 	iph = (*pskb)->nh.iph;
 	tcplen = (*pskb)->len - iph->ihl*4;
 
@@ -186,9 +190,6 @@ ipt_tcpmss_target(struct sk_buff **pskb,
 	       newmss);
 
  retmodified:
-	/* We never hw checksum SYN packets.  */
-	BUG_ON((*pskb)->ip_summed == CHECKSUM_HW);
-
 	(*pskb)->nfcache |= NFC_UNKNOWN | NFC_ALTERED;
 	return IPT_CONTINUE;
 }