40 files changed, 98 insertions, 101 deletions

diff --git a/net/core/datagram.c b/net/core/datagram.c
index aecddcc30401..f558c61aecc7 100644
--- a/net/core/datagram.c
+++ b/net/core/datagram.c
@@ -417,7 +417,7 @@ unsigned int __skb_checksum_complete(struct sk_buff *skb)
 
         sum = (u16)csum_fold(skb_checksum(skb, 0, skb->len, skb->csum));
         if (likely(!sum)) {
-                if (unlikely(skb->ip_summed == CHECKSUM_HW))
+                if (unlikely(skb->ip_summed == CHECKSUM_COMPLETE))
                         netdev_rx_csum_fault(skb->dev);
                 skb->ip_summed = CHECKSUM_UNNECESSARY;
         }
@@ -462,7 +462,7 @@ int skb_copy_and_csum_datagram_iovec(struct sk_buff *skb,
                         goto fault;
                 if ((unsigned short)csum_fold(csum))
                         goto csum_error;
-                if (unlikely(skb->ip_summed == CHECKSUM_HW))
+                if (unlikely(skb->ip_summed == CHECKSUM_COMPLETE))
                         netdev_rx_csum_fault(skb->dev);
                 iov->iov_len -= chunk;
                 iov->iov_base += chunk;
diff --git a/net/core/dev.c b/net/core/dev.c
index d4a1ec3bded5..fc82f6f6e1c1 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -1166,12 +1166,12 @@ EXPORT_SYMBOL(netif_device_attach);
  * Invalidate hardware checksum when packet is to be mangled, and
  * complete checksum manually on outgoing path.
  */
-int skb_checksum_help(struct sk_buff *skb, int inward)
+int skb_checksum_help(struct sk_buff *skb)
 {
         unsigned int csum;
         int ret = 0, offset = skb->h.raw - skb->data;
 
-        if (inward)
+        if (skb->ip_summed == CHECKSUM_COMPLETE)
                 goto out_set_summed;
 
         if (unlikely(skb_shinfo(skb)->gso_size)) {
@@ -1223,7 +1223,7 @@ struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features)
         skb->mac_len = skb->nh.raw - skb->data;
         __skb_pull(skb, skb->mac_len);
 
-        if (unlikely(skb->ip_summed != CHECKSUM_HW)) {
+        if (unlikely(skb->ip_summed != CHECKSUM_PARTIAL)) {
                 if (skb_header_cloned(skb) &&
                     (err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC)))
                         return ERR_PTR(err);
@@ -1232,7 +1232,7 @@ struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features)
         rcu_read_lock();
         list_for_each_entry_rcu(ptype, &ptype_base[ntohs(type) & 15], list) {
                 if (ptype->type == type && !ptype->dev && ptype->gso_segment) {
-                        if (unlikely(skb->ip_summed != CHECKSUM_HW)) {
+                        if (unlikely(skb->ip_summed != CHECKSUM_PARTIAL)) {
                                 err = ptype->gso_send_check(skb);
                                 segs = ERR_PTR(err);
                                 if (err || skb_gso_ok(skb, features))
@@ -1444,11 +1444,11 @@ int dev_queue_xmit(struct sk_buff *skb)
         /* If packet is not checksummed and device does not support
          * checksumming for this protocol, complete checksumming here.
          */
-        if (skb->ip_summed == CHECKSUM_HW &&
+        if (skb->ip_summed == CHECKSUM_PARTIAL &&
             (!(dev->features & NETIF_F_GEN_CSUM) &&
              (!(dev->features & NETIF_F_IP_CSUM) ||
               skb->protocol != htons(ETH_P_IP))))
-                if (skb_checksum_help(skb, 0))
+                if (skb_checksum_help(skb))
                         goto out_kfree_skb;
 
 gso:
diff --git a/net/core/netpoll.c b/net/core/netpoll.c
index 471da451cd48..ead5920c26d6 100644
--- a/net/core/netpoll.c
+++ b/net/core/netpoll.c
@@ -110,7 +110,7 @@ static int checksum_udp(struct sk_buff *skb, struct udphdr *uh,
 
         psum = csum_tcpudp_nofold(saddr, daddr, ulen, IPPROTO_UDP, 0);
 
-        if (skb->ip_summed == CHECKSUM_HW &&
+        if (skb->ip_summed == CHECKSUM_COMPLETE &&
             !(u16)csum_fold(csum_add(psum, skb->csum)))
                 return 0;
 
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index c54f3664bce5..8a476f1956e5 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -1397,7 +1397,7 @@ void skb_copy_and_csum_dev(const struct sk_buff *skb, u8 *to)
         unsigned int csum;
         long csstart;
 
-        if (skb->ip_summed == CHECKSUM_HW)
+        if (skb->ip_summed == CHECKSUM_PARTIAL)
                 csstart = skb->h.raw - skb->data;
         else
                 csstart = skb_headlen(skb);
@@ -1411,7 +1411,7 @@ void skb_copy_and_csum_dev(const struct sk_buff *skb, u8 *to)
                 csum = skb_copy_and_csum_bits(skb, csstart, to + csstart,
                                               skb->len - csstart, 0);
 
-        if (skb->ip_summed == CHECKSUM_HW) {
+        if (skb->ip_summed == CHECKSUM_PARTIAL) {
                 long csstuff = csstart + skb->csum;
 
                 *((unsigned short *)(to + csstuff)) = csum_fold(csum);
@@ -1898,10 +1898,10 @@ int skb_append_datato_frags(struct sock *sk, struct sk_buff *skb,
  *      @len: length of data pulled
  *
  *      This function performs an skb_pull on the packet and updates
- *      update the CHECKSUM_HW checksum.  It should be used on receive
- *      path processing instead of skb_pull unless you know that the
- *      checksum difference is zero (e.g., a valid IP header) or you
- *      are setting ip_summed to CHECKSUM_NONE.
+ *      update the CHECKSUM_COMPLETE checksum.  It should be used on
+ *      receive path processing instead of skb_pull unless you know
+ *      that the checksum difference is zero (e.g., a valid IP header)
+ *      or you are setting ip_summed to CHECKSUM_NONE.
  */
 unsigned char *skb_pull_rcsum(struct sk_buff *skb, unsigned int len)
 {
@@ -1994,7 +1994,7 @@ struct sk_buff *skb_segment(struct sk_buff *skb, int features)
                 frag = skb_shinfo(nskb)->frags;
                 k = 0;
 
-                nskb->ip_summed = CHECKSUM_HW;
+                nskb->ip_summed = CHECKSUM_PARTIAL;
                 nskb->csum = skb->csum;
                 memcpy(skb_put(nskb, hsize), skb->data + offset, hsize);
 
diff --git a/net/ipv4/icmp.c b/net/ipv4/icmp.c
index 6ad797c14163..6d223e5c6741 100644
--- a/net/ipv4/icmp.c
+++ b/net/ipv4/icmp.c
@@ -930,7 +930,7 @@ int icmp_rcv(struct sk_buff *skb)
         ICMP_INC_STATS_BH(ICMP_MIB_INMSGS);
 
         switch (skb->ip_summed) {
-        case CHECKSUM_HW:
+        case CHECKSUM_COMPLETE:
                 if (!(u16)csum_fold(skb->csum))
                         break;
                 /* fall through */
diff --git a/net/ipv4/igmp.c b/net/ipv4/igmp.c
index 8e8117c19e4d..7003e763d970 100644
--- a/net/ipv4/igmp.c
+++ b/net/ipv4/igmp.c
@@ -931,7 +931,7 @@ int igmp_rcv(struct sk_buff *skb)
                 goto drop;
 
         switch (skb->ip_summed) {
-        case CHECKSUM_HW:
+        case CHECKSUM_COMPLETE:
                 if (!(u16)csum_fold(skb->csum))
                         break;
                 /* fall through */
diff --git a/net/ipv4/ip_fragment.c b/net/ipv4/ip_fragment.c
index b84b53a47526..8d7f107c2eef 100644
--- a/net/ipv4/ip_fragment.c
+++ b/net/ipv4/ip_fragment.c
@@ -665,7 +665,7 @@ static struct sk_buff *ip_frag_reasm(struct ipq *qp, struct net_device *dev)
                 head->len += fp->len;
                 if (head->ip_summed != fp->ip_summed)
                         head->ip_summed = CHECKSUM_NONE;
-                else if (head->ip_summed == CHECKSUM_HW)
+                else if (head->ip_summed == CHECKSUM_COMPLETE)
                         head->csum = csum_add(head->csum, fp->csum);
                 head->truesize += fp->truesize;
                 atomic_sub(fp->truesize, &ip_frag_mem);
diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c
index 0f9b3a31997b..e66f6ff2e198 100644
--- a/net/ipv4/ip_gre.c
+++ b/net/ipv4/ip_gre.c
@@ -576,7 +576,7 @@ static int ipgre_rcv(struct sk_buff *skb)
 
                 if (flags&GRE_CSUM) {
                         switch (skb->ip_summed) {
-                        case CHECKSUM_HW:
+                        case CHECKSUM_COMPLETE:
                                 csum = (u16)csum_fold(skb->csum);
                                 if (!csum)
                                         break;
@@ -584,7 +584,7 @@ static int ipgre_rcv(struct sk_buff *skb)
                         case CHECKSUM_NONE:
                                 skb->csum = 0;
                                 csum = __skb_checksum_complete(skb);
-                                skb->ip_summed = CHECKSUM_HW;
+                                skb->ip_summed = CHECKSUM_COMPLETE;
                         }
                         offset += 4;
                 }
diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c
index 308bdeac3455..1b9b6742ef77 100644
--- a/net/ipv4/ip_output.c
+++ b/net/ipv4/ip_output.c
@@ -680,7 +680,7 @@ ip_generic_getfrag(void *from, char *to, int offset, int len, int odd, struct sk
 {
         struct iovec *iov = from;
 
-        if (skb->ip_summed == CHECKSUM_HW) {
+        if (skb->ip_summed == CHECKSUM_PARTIAL) {
                 if (memcpy_fromiovecend(to, iov, offset, len) < 0)
                         return -EFAULT;
         } else {
@@ -736,7 +736,7 @@ static inline int ip_ufo_append_data(struct sock *sk,
                 /* initialize protocol header pointer */
                 skb->h.raw = skb->data + fragheaderlen;
 
-                skb->ip_summed = CHECKSUM_HW;
+                skb->ip_summed = CHECKSUM_PARTIAL;
                 skb->csum = 0;
                 sk->sk_sndmsg_off = 0;
         }
@@ -844,7 +844,7 @@ int ip_append_data(struct sock *sk,
             length + fragheaderlen <= mtu &&
             rt->u.dst.dev->features & NETIF_F_ALL_CSUM &&
             !exthdrlen)
-                csummode = CHECKSUM_HW;
+                csummode = CHECKSUM_PARTIAL;
 
         inet->cork.length += length;
         if (((length > mtu) && (sk->sk_protocol == IPPROTO_UDP)) &&
diff --git a/net/ipv4/ipvs/ip_vs_proto_tcp.c b/net/ipv4/ipvs/ip_vs_proto_tcp.c
index bc28b1160a3a..820e8318d10d 100644
--- a/net/ipv4/ipvs/ip_vs_proto_tcp.c
+++ b/net/ipv4/ipvs/ip_vs_proto_tcp.c
@@ -151,7 +151,7 @@ tcp_snat_handler(struct sk_buff **pskb,
                 /* Only port and addr are changed, do fast csum update */
                 tcp_fast_csum_update(tcph, cp->daddr, cp->vaddr,
                                      cp->dport, cp->vport);
-                if ((*pskb)->ip_summed == CHECKSUM_HW)
+                if ((*pskb)->ip_summed == CHECKSUM_COMPLETE)
                         (*pskb)->ip_summed = CHECKSUM_NONE;
         } else {
                 /* full checksum calculation */
@@ -204,7 +204,7 @@ tcp_dnat_handler(struct sk_buff **pskb,
                 /* Only port and addr are changed, do fast csum update */
                 tcp_fast_csum_update(tcph, cp->vaddr, cp->daddr,
                                      cp->vport, cp->dport);
-                if ((*pskb)->ip_summed == CHECKSUM_HW)
+                if ((*pskb)->ip_summed == CHECKSUM_COMPLETE)
                         (*pskb)->ip_summed = CHECKSUM_NONE;
         } else {
                 /* full checksum calculation */
@@ -229,7 +229,7 @@ tcp_csum_check(struct sk_buff *skb, struct ip_vs_protocol *pp)
         switch (skb->ip_summed) {
         case CHECKSUM_NONE:
                 skb->csum = skb_checksum(skb, tcphoff, skb->len - tcphoff, 0);
-        case CHECKSUM_HW:
+        case CHECKSUM_COMPLETE:
                 if (csum_tcpudp_magic(skb->nh.iph->saddr, skb->nh.iph->daddr,
                                       skb->len - tcphoff,
                                       skb->nh.iph->protocol, skb->csum)) {
@@ -239,7 +239,7 @@ tcp_csum_check(struct sk_buff *skb, struct ip_vs_protocol *pp)
                 }
                 break;
         default:
-                /* CHECKSUM_UNNECESSARY */
+                /* No need to checksum. */
                 break;
         }
 
diff --git a/net/ipv4/ipvs/ip_vs_proto_udp.c b/net/ipv4/ipvs/ip_vs_proto_udp.c
index 89d9175d8f28..90c8166c0ec1 100644
--- a/net/ipv4/ipvs/ip_vs_proto_udp.c
+++ b/net/ipv4/ipvs/ip_vs_proto_udp.c
@@ -161,7 +161,7 @@ udp_snat_handler(struct sk_buff **pskb,
                 /* Only port and addr are changed, do fast csum update */
                 udp_fast_csum_update(udph, cp->daddr, cp->vaddr,
                                      cp->dport, cp->vport);
-                if ((*pskb)->ip_summed == CHECKSUM_HW)
+                if ((*pskb)->ip_summed == CHECKSUM_COMPLETE)
                         (*pskb)->ip_summed = CHECKSUM_NONE;
         } else {
                 /* full checksum calculation */
@@ -216,7 +216,7 @@ udp_dnat_handler(struct sk_buff **pskb,
                 /* Only port and addr are changed, do fast csum update */
                 udp_fast_csum_update(udph, cp->vaddr, cp->daddr,
                                      cp->vport, cp->dport);
-                if ((*pskb)->ip_summed == CHECKSUM_HW)
+                if ((*pskb)->ip_summed == CHECKSUM_COMPLETE)
                         (*pskb)->ip_summed = CHECKSUM_NONE;
         } else {
                 /* full checksum calculation */
@@ -250,7 +250,7 @@ udp_csum_check(struct sk_buff *skb, struct ip_vs_protocol *pp)
                 case CHECKSUM_NONE:
                         skb->csum = skb_checksum(skb, udphoff,
                                                  skb->len - udphoff, 0);
-                case CHECKSUM_HW:
+                case CHECKSUM_COMPLETE:
                         if (csum_tcpudp_magic(skb->nh.iph->saddr,
                                               skb->nh.iph->daddr,
                                               skb->len - udphoff,
@@ -262,7 +262,7 @@ udp_csum_check(struct sk_buff *skb, struct ip_vs_protocol *pp)
                         }
                         break;
                 default:
-                        /* CHECKSUM_UNNECESSARY */
+                        /* No need to checksum. */
                         break;
                 }
         }
diff --git a/net/ipv4/netfilter.c b/net/ipv4/netfilter.c
index 6a9e34b794bc..f88347de21a9 100644
--- a/net/ipv4/netfilter.c
+++ b/net/ipv4/netfilter.c
@@ -168,7 +168,7 @@ unsigned int nf_ip_checksum(struct sk_buff *skb, unsigned int hook,
         unsigned int csum = 0;
 
         switch (skb->ip_summed) {
-        case CHECKSUM_HW:
+        case CHECKSUM_COMPLETE:
                 if (hook != NF_IP_PRE_ROUTING && hook != NF_IP_LOCAL_IN)
                         break;
                 if ((protocol == 0 && !(u16)csum_fold(skb->csum)) ||
diff --git a/net/ipv4/netfilter/ip_conntrack_proto_tcp.c b/net/ipv4/netfilter/ip_conntrack_proto_tcp.c
index fb920e76ec10..9de81ff645d5 100644
--- a/net/ipv4/netfilter/ip_conntrack_proto_tcp.c
+++ b/net/ipv4/netfilter/ip_conntrack_proto_tcp.c
@@ -865,8 +865,7 @@ static int tcp_error(struct sk_buff *skb,
   
         /* Checksum invalid? Ignore.
          * We skip checking packets on the outgoing path
-         * because the semantic of CHECKSUM_HW is different there 
-         * and moreover root might send raw packets.
+         * because it is assumed to be correct.
          */
         /* FIXME: Source route IP option packets --RR */
         if (ip_conntrack_checksum && hooknum == NF_IP_PRE_ROUTING &&
diff --git a/net/ipv4/netfilter/ip_conntrack_proto_udp.c b/net/ipv4/netfilter/ip_conntrack_proto_udp.c
index 9b2c16b4d2ff..e58e52f14553 100644
--- a/net/ipv4/netfilter/ip_conntrack_proto_udp.c
+++ b/net/ipv4/netfilter/ip_conntrack_proto_udp.c
@@ -117,8 +117,7 @@ static int udp_error(struct sk_buff *skb, enum ip_conntrack_info *ctinfo,
 
         /* Checksum invalid? Ignore.
          * We skip checking packets on the outgoing path
-         * because the semantic of CHECKSUM_HW is different there 
-         * and moreover root might send raw packets.
+         * because the checksum is assumed to be correct.
          * FIXME: Source route IP option packets --RR */
         if (ip_conntrack_checksum && hooknum == NF_IP_PRE_ROUTING &&
             nf_ip_checksum(skb, hooknum, iph->ihl * 4, IPPROTO_UDP)) {
diff --git a/net/ipv4/netfilter/ip_nat_standalone.c b/net/ipv4/netfilter/ip_nat_standalone.c
index 17de077a7901..f4f00c816d87 100644
--- a/net/ipv4/netfilter/ip_nat_standalone.c
+++ b/net/ipv4/netfilter/ip_nat_standalone.c
@@ -111,8 +111,9 @@ ip_nat_fn(unsigned int hooknum,
                        & htons(IP_MF|IP_OFFSET)));
 
         /* If we had a hardware checksum before, it's now invalid */
-        if ((*pskb)->ip_summed == CHECKSUM_HW)
-                if (skb_checksum_help(*pskb, (out == NULL)))
+        if ((*pskb)->ip_summed == CHECKSUM_PARTIAL ||
+            (*pskb)->ip_summed == CHECKSUM_COMPLETE)
+                if (skb_checksum_help(*pskb))
                         return NF_DROP;
 
         ct = ip_conntrack_get(*pskb, &ctinfo);
diff --git a/net/ipv4/netfilter/ip_queue.c b/net/ipv4/netfilter/ip_queue.c
index 198ac36db861..276a964ee6cf 100644
--- a/net/ipv4/netfilter/ip_queue.c
+++ b/net/ipv4/netfilter/ip_queue.c
@@ -208,9 +208,9 @@ 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))) {
+                if ((entry->skb->ip_summed == CHECKSUM_PARTIAL ||
+                     entry->skb->ip_summed == CHECKSUM_COMPLETE) &&
+                    (*errp = skb_checksum_help(entry->skb))) {
                         read_unlock_bh(&queue_lock);
                         return NULL;
                 }
diff --git a/net/ipv4/netfilter/ipt_ECN.c b/net/ipv4/netfilter/ipt_ECN.c
index 4adf5c9d34f5..4ec43f98fe49 100644
--- a/net/ipv4/netfilter/ipt_ECN.c
+++ b/net/ipv4/netfilter/ipt_ECN.c
@@ -49,7 +49,7 @@ set_ect_ip(struct sk_buff **pskb, const struct ipt_ECN_info *einfo)
 
 /* Return 0 if there was an error. */
 static inline int
-set_ect_tcp(struct sk_buff **pskb, const struct ipt_ECN_info *einfo, int inward)
+set_ect_tcp(struct sk_buff **pskb, const struct ipt_ECN_info *einfo)
 {
         struct tcphdr _tcph, *tcph;
         u_int16_t diffs[2];
@@ -70,8 +70,9 @@ set_ect_tcp(struct sk_buff **pskb, const struct ipt_ECN_info *einfo, int inward)
                 return 0;
         tcph = (void *)(*pskb)->nh.iph + (*pskb)->nh.iph->ihl*4;
 
-        if ((*pskb)->ip_summed == CHECKSUM_HW &&
-            skb_checksum_help(*pskb, inward))
+        if (((*pskb)->ip_summed == CHECKSUM_PARTIAL ||
+             (*pskb)->ip_summed == CHECKSUM_COMPLETE) &&
+            skb_checksum_help(*pskb))
                 return 0;
 
         diffs[0] = ((u_int16_t *)tcph)[6];
@@ -106,7 +107,7 @@ target(struct sk_buff **pskb,
 
         if (einfo->operation & (IPT_ECN_OP_SET_ECE | IPT_ECN_OP_SET_CWR)
             && (*pskb)->nh.iph->protocol == IPPROTO_TCP)
-                if (!set_ect_tcp(pskb, einfo, (out == NULL)))
+                if (!set_ect_tcp(pskb, einfo))
                         return NF_DROP;
 
         return IPT_CONTINUE;
diff --git a/net/ipv4/netfilter/ipt_TCPMSS.c b/net/ipv4/netfilter/ipt_TCPMSS.c
index ef2fe5b3f0d8..c998dc0fcd15 100644
--- a/net/ipv4/netfilter/ipt_TCPMSS.c
+++ b/net/ipv4/netfilter/ipt_TCPMSS.c
@@ -62,8 +62,9 @@ ipt_tcpmss_target(struct sk_buff **pskb,
         if (!skb_make_writable(pskb, (*pskb)->len))
                 return NF_DROP;
 
-        if ((*pskb)->ip_summed == CHECKSUM_HW &&
-            skb_checksum_help(*pskb, out == NULL))
+        if (((*pskb)->ip_summed == CHECKSUM_PARTIAL ||
+             (*pskb)->ip_summed == CHECKSUM_COMPLETE) &&
+            skb_checksum_help(*pskb))
                 return NF_DROP;
 
         iph = (*pskb)->nh.iph;
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 934396bb1376..b0124e69ab38 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -568,7 +568,7 @@ new_segment:
                 skb->truesize += copy;
                 sk->sk_wmem_queued += copy;
                 sk->sk_forward_alloc -= copy;
-                skb->ip_summed = CHECKSUM_HW;
+                skb->ip_summed = CHECKSUM_PARTIAL;
                 tp->write_seq += copy;
                 TCP_SKB_CB(skb)->end_seq += copy;
                 skb_shinfo(skb)->gso_segs = 0;
@@ -723,7 +723,7 @@ new_segment:
                                  * Check whether we can use HW checksum.
                                  */
                                 if (sk->sk_route_caps & NETIF_F_ALL_CSUM)
-                                        skb->ip_summed = CHECKSUM_HW;
+                                        skb->ip_summed = CHECKSUM_PARTIAL;
 
                                 skb_entail(sk, tp, skb);
                                 copy = size_goal;
@@ -2205,7 +2205,7 @@ struct sk_buff *tcp_tso_segment(struct sk_buff *skb, int features)
                 th->fin = th->psh = 0;
 
                 th->check = ~csum_fold(th->check + delta);
-                if (skb->ip_summed != CHECKSUM_HW)
+                if (skb->ip_summed != CHECKSUM_PARTIAL)
                         th->check = csum_fold(csum_partial(skb->h.raw, thlen,
                                                            skb->csum));
 
@@ -2219,7 +2219,7 @@ struct sk_buff *tcp_tso_segment(struct sk_buff *skb, int features)
 
         delta = htonl(oldlen + (skb->tail - skb->h.raw) + skb->data_len);
         th->check = ~csum_fold(th->check + delta);
-        if (skb->ip_summed != CHECKSUM_HW)
+        if (skb->ip_summed != CHECKSUM_PARTIAL)
                 th->check = csum_fold(csum_partial(skb->h.raw, thlen,
                                                    skb->csum));
 
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index 43f6740244f8..b2aa512a30e9 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -484,7 +484,7 @@ void tcp_v4_send_check(struct sock *sk, int len, struct sk_buff *skb)
         struct inet_sock *inet = inet_sk(sk);
         struct tcphdr *th = skb->h.th;
 
-        if (skb->ip_summed == CHECKSUM_HW) {
+        if (skb->ip_summed == CHECKSUM_PARTIAL) {
                 th->check = ~tcp_v4_check(th, len, inet->saddr, inet->daddr, 0);
                 skb->csum = offsetof(struct tcphdr, check);
         } else {
@@ -509,7 +509,7 @@ int tcp_v4_gso_send_check(struct sk_buff *skb)
         th->check = 0;
         th->check = ~tcp_v4_check(th, skb->len, iph->saddr, iph->daddr, 0);
         skb->csum = offsetof(struct tcphdr, check);
-        skb->ip_summed = CHECKSUM_HW;
+        skb->ip_summed = CHECKSUM_PARTIAL;
         return 0;
 }
 
@@ -973,7 +973,7 @@ static struct sock *tcp_v4_hnd_req(struct sock *sk, struct sk_buff *skb)
 
 static int tcp_v4_checksum_init(struct sk_buff *skb)
 {
-        if (skb->ip_summed == CHECKSUM_HW) {
+        if (skb->ip_summed == CHECKSUM_COMPLETE) {
                 if (!tcp_v4_check(skb->h.th, skb->len, skb->nh.iph->saddr,
                                   skb->nh.iph->daddr, skb->csum)) {
                         skb->ip_summed = CHECKSUM_UNNECESSARY;
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index b4f3ffe1b3b4..9252a50c4b49 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -577,7 +577,7 @@ int tcp_fragment(struct sock *sk, struct sk_buff *skb, u32 len, unsigned int mss
         TCP_SKB_CB(buff)->sacked = TCP_SKB_CB(skb)->sacked;
         TCP_SKB_CB(skb)->sacked &= ~TCPCB_AT_TAIL;
 
-        if (!skb_shinfo(skb)->nr_frags && skb->ip_summed != CHECKSUM_HW) {
+        if (!skb_shinfo(skb)->nr_frags && skb->ip_summed != CHECKSUM_PARTIAL) {
                 /* Copy and checksum data tail into the new buffer. */
                 buff->csum = csum_partial_copy_nocheck(skb->data + len, skb_put(buff, nsize),
                                                        nsize, 0);
@@ -586,7 +586,7 @@ int tcp_fragment(struct sock *sk, struct sk_buff *skb, u32 len, unsigned int mss
 
                 skb->csum = csum_block_sub(skb->csum, buff->csum, len);
         } else {
-                skb->ip_summed = CHECKSUM_HW;
+                skb->ip_summed = CHECKSUM_PARTIAL;
                 skb_split(skb, buff, len);
         }
 
@@ -689,7 +689,7 @@ int tcp_trim_head(struct sock *sk, struct sk_buff *skb, u32 len)
                 __pskb_trim_head(skb, len - skb_headlen(skb));
 
         TCP_SKB_CB(skb)->seq += len;
-        skb->ip_summed = CHECKSUM_HW;
+        skb->ip_summed = CHECKSUM_PARTIAL;
 
         skb->truesize        -= len;
         sk->sk_wmem_queued   -= len;
@@ -1062,7 +1062,7 @@ static int tso_fragment(struct sock *sk, struct sk_buff *skb, unsigned int len,
         /* This packet was never sent out yet, so no SACK bits. */
         TCP_SKB_CB(buff)->sacked = 0;
 
-        buff->ip_summed = skb->ip_summed = CHECKSUM_HW;
+        buff->ip_summed = skb->ip_summed = CHECKSUM_PARTIAL;
         skb_split(skb, buff, len);
 
         /* Fix up tso_factor for both original and new SKB.  */
@@ -1206,8 +1206,7 @@ static int tcp_mtu_probe(struct sock *sk)
         TCP_SKB_CB(nskb)->flags = TCPCB_FLAG_ACK;
         TCP_SKB_CB(nskb)->sacked = 0;
         nskb->csum = 0;
-        if (skb->ip_summed == CHECKSUM_HW)
-                nskb->ip_summed = CHECKSUM_HW;
+        nskb->ip_summed = skb->ip_summed;
 
         len = 0;
         while (len < probe_size) {
@@ -1231,7 +1230,7 @@ static int tcp_mtu_probe(struct sock *sk)
                                                    ~(TCPCB_FLAG_FIN|TCPCB_FLAG_PSH);
                         if (!skb_shinfo(skb)->nr_frags) {
                                 skb_pull(skb, copy);
-                                if (skb->ip_summed != CHECKSUM_HW)
+                                if (skb->ip_summed != CHECKSUM_PARTIAL)
                                         skb->csum = csum_partial(skb->data, skb->len, 0);
                         } else {
                                 __pskb_trim_head(skb, copy);
@@ -1572,10 +1571,9 @@ static void tcp_retrans_try_collapse(struct sock *sk, struct sk_buff *skb, int m
 
                 memcpy(skb_put(skb, next_skb_size), next_skb->data, next_skb_size);
 
-                if (next_skb->ip_summed == CHECKSUM_HW)
-                        skb->ip_summed = CHECKSUM_HW;
+                skb->ip_summed = next_skb->ip_summed;
 
-                if (skb->ip_summed != CHECKSUM_HW)
+                if (skb->ip_summed != CHECKSUM_PARTIAL)
                         skb->csum = csum_block_add(skb->csum, next_skb->csum, skb_size);
 
                 /* Update sequence range on original skb. */
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index a4d005eccc7f..87152510980c 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -429,7 +429,7 @@ static int udp_push_pending_frames(struct sock *sk, struct udp_sock *up)
                 /*
                  * Only one fragment on the socket.
                  */
-                if (skb->ip_summed == CHECKSUM_HW) {
+                if (skb->ip_summed == CHECKSUM_PARTIAL) {
                         skb->csum = offsetof(struct udphdr, check);
                         uh->check = ~csum_tcpudp_magic(fl->fl4_src, fl->fl4_dst,
                                         up->len, IPPROTO_UDP, 0);
@@ -448,7 +448,7 @@ static int udp_push_pending_frames(struct sock *sk, struct udp_sock *up)
                  * fragments on the socket so that all csums of sk_buffs
                  * should be together.
                  */
-                if (skb->ip_summed == CHECKSUM_HW) {
+                if (skb->ip_summed == CHECKSUM_PARTIAL) {
                         int offset = (unsigned char *)uh - skb->data;
                         skb->csum = skb_checksum(skb, offset, skb->len - offset, 0);
 
@@ -1088,7 +1088,7 @@ static void udp_checksum_init(struct sk_buff *skb, struct udphdr *uh,
 {
         if (uh->check == 0) {
                 skb->ip_summed = CHECKSUM_UNNECESSARY;
-        } else if (skb->ip_summed == CHECKSUM_HW) {
+        } else if (skb->ip_summed == CHECKSUM_COMPLETE) {
                 if (!udp_check(uh, ulen, saddr, daddr, skb->csum))
                         skb->ip_summed = CHECKSUM_UNNECESSARY;
         }
diff --git a/net/ipv4/xfrm4_output.c b/net/ipv4/xfrm4_output.c
index d16f863cf687..4a96a9e3ef3b 100644
--- a/net/ipv4/xfrm4_output.c
+++ b/net/ipv4/xfrm4_output.c
@@ -48,8 +48,8 @@ static int xfrm4_output_one(struct sk_buff *skb)
         struct xfrm_state *x = dst->xfrm;
         int err;
         
-        if (skb->ip_summed == CHECKSUM_HW) {
-                err = skb_checksum_help(skb, 0);
+        if (skb->ip_summed == CHECKSUM_PARTIAL) {
+                err = skb_checksum_help(skb);
                 if (err)
                         goto error_nolock;
         }
diff --git a/net/ipv6/exthdrs.c b/net/ipv6/exthdrs.c
index 86dac106873b..05afa6b1912b 100644
--- a/net/ipv6/exthdrs.c
+++ b/net/ipv6/exthdrs.c
@@ -294,7 +294,7 @@ looped_back:
                 hdr = (struct ipv6_rt_hdr *) skb2->h.raw;
         }
 
-        if (skb->ip_summed == CHECKSUM_HW)
+        if (skb->ip_summed == CHECKSUM_COMPLETE)
                 skb->ip_summed = CHECKSUM_NONE;
 
         i = n - --hdr->segments_left;
diff --git a/net/ipv6/icmp.c b/net/ipv6/icmp.c
index dbfce089e916..103055107674 100644
--- a/net/ipv6/icmp.c
+++ b/net/ipv6/icmp.c
@@ -606,7 +606,7 @@ static int icmpv6_rcv(struct sk_buff **pskb)
 
         /* Perform checksum. */
         switch (skb->ip_summed) {
-        case CHECKSUM_HW:
+        case CHECKSUM_COMPLETE:
                 if (!csum_ipv6_magic(saddr, daddr, skb->len, IPPROTO_ICMPV6,
                                      skb->csum))
                         break;
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index 4fb47a252913..65514f21c186 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -866,7 +866,7 @@ static inline int ip6_ufo_append_data(struct sock *sk,
                 /* initialize protocol header pointer */
                 skb->h.raw = skb->data + fragheaderlen;
 
-                skb->ip_summed = CHECKSUM_HW;
+                skb->ip_summed = CHECKSUM_PARTIAL;
                 skb->csum = 0;
                 sk->sk_sndmsg_off = 0;
         }
diff --git a/net/ipv6/netfilter.c b/net/ipv6/netfilter.c
index 395a417ba955..580b1aba6722 100644
--- a/net/ipv6/netfilter.c
+++ b/net/ipv6/netfilter.c
@@ -87,7 +87,7 @@ unsigned int nf_ip6_checksum(struct sk_buff *skb, unsigned int hook,
         unsigned int csum = 0;
 
         switch (skb->ip_summed) {
-        case CHECKSUM_HW:
+        case CHECKSUM_COMPLETE:
                 if (hook != NF_IP6_PRE_ROUTING && hook != NF_IP6_LOCAL_IN)
                         break;
                 if (!csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr,
diff --git a/net/ipv6/netfilter/ip6_queue.c b/net/ipv6/netfilter/ip6_queue.c
index 968a14be0d05..c01c126224e2 100644
--- a/net/ipv6/netfilter/ip6_queue.c
+++ b/net/ipv6/netfilter/ip6_queue.c
@@ -206,9 +206,9 @@ 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))) {
+                if ((entry->skb->ip_summed == CHECKSUM_PARTIAL ||
+                     entry->skb->ip_summed == CHECKSUM_COMPLETE) &&
+                    (*errp = skb_checksum_help(entry->skb))) {
                         read_unlock_bh(&queue_lock);
                         return NULL;
                 }
diff --git a/net/ipv6/netfilter/nf_conntrack_reasm.c b/net/ipv6/netfilter/nf_conntrack_reasm.c
index 00d5583807f7..7a4e4c2e3197 100644
--- a/net/ipv6/netfilter/nf_conntrack_reasm.c
+++ b/net/ipv6/netfilter/nf_conntrack_reasm.c
@@ -408,7 +408,7 @@ static int nf_ct_frag6_queue(struct nf_ct_frag6_queue *fq, struct sk_buff *skb,
                 return -1;
         }
 
-        if (skb->ip_summed == CHECKSUM_HW)
+        if (skb->ip_summed == CHECKSUM_COMPLETE)
                 skb->csum = csum_sub(skb->csum,
                                      csum_partial(skb->nh.raw,
                                                   (u8*)(fhdr + 1) - skb->nh.raw,
@@ -640,7 +640,7 @@ nf_ct_frag6_reasm(struct nf_ct_frag6_queue *fq, struct net_device *dev)
                 head->len += fp->len;
                 if (head->ip_summed != fp->ip_summed)
                         head->ip_summed = CHECKSUM_NONE;
-                else if (head->ip_summed == CHECKSUM_HW)
+                else if (head->ip_summed == CHECKSUM_COMPLETE)
                         head->csum = csum_add(head->csum, fp->csum);
                 head->truesize += fp->truesize;
                 atomic_sub(fp->truesize, &nf_ct_frag6_mem);
@@ -652,7 +652,7 @@ nf_ct_frag6_reasm(struct nf_ct_frag6_queue *fq, struct net_device *dev)
         head->nh.ipv6h->payload_len = htons(payload_len);
 
         /* Yes, and fold redundant checksum back. 8) */
-        if (head->ip_summed == CHECKSUM_HW)
+        if (head->ip_summed == CHECKSUM_COMPLETE)
                 head->csum = csum_partial(head->nh.raw, head->h.raw-head->nh.raw, head->csum);
 
         fq->fragments = NULL;
diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c
index d5040e172292..d4af1cb5e19f 100644
--- a/net/ipv6/raw.c
+++ b/net/ipv6/raw.c
@@ -334,7 +334,7 @@ int rawv6_rcv(struct sock *sk, struct sk_buff *skb)
         if (!rp->checksum)
                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 
-        if (skb->ip_summed == CHECKSUM_HW) {
+        if (skb->ip_summed == CHECKSUM_COMPLETE) {
                 skb_postpull_rcsum(skb, skb->nh.raw,
                                    skb->h.raw - skb->nh.raw);
                 if (!csum_ipv6_magic(&skb->nh.ipv6h->saddr,
diff --git a/net/ipv6/reassembly.c b/net/ipv6/reassembly.c
index 4e299c69e1c6..a8623d2b0879 100644
--- a/net/ipv6/reassembly.c
+++ b/net/ipv6/reassembly.c
@@ -433,7 +433,7 @@ static void ip6_frag_queue(struct frag_queue *fq, struct sk_buff *skb,
                 return;
         }
 
-        if (skb->ip_summed == CHECKSUM_HW)
+        if (skb->ip_summed == CHECKSUM_COMPLETE)
                 skb->csum = csum_sub(skb->csum,
                                      csum_partial(skb->nh.raw, (u8*)(fhdr+1)-skb->nh.raw, 0));
 
@@ -647,7 +647,7 @@ static int ip6_frag_reasm(struct frag_queue *fq, struct sk_buff **skb_in,
                 head->len += fp->len;
                 if (head->ip_summed != fp->ip_summed)
                         head->ip_summed = CHECKSUM_NONE;
-                else if (head->ip_summed == CHECKSUM_HW)
+                else if (head->ip_summed == CHECKSUM_COMPLETE)
                         head->csum = csum_add(head->csum, fp->csum);
                 head->truesize += fp->truesize;
                 atomic_sub(fp->truesize, &ip6_frag_mem);
@@ -662,7 +662,7 @@ static int ip6_frag_reasm(struct frag_queue *fq, struct sk_buff **skb_in,
         *skb_in = head;
 
         /* Yes, and fold redundant checksum back. 8) */
-        if (head->ip_summed == CHECKSUM_HW)
+        if (head->ip_summed == CHECKSUM_COMPLETE)
                 head->csum = csum_partial(head->nh.raw, head->h.raw-head->nh.raw, head->csum);
 
         IP6_INC_STATS_BH(IPSTATS_MIB_REASMOKS);
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 302786a11cd6..7f1b660493b7 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -545,7 +545,7 @@ static void tcp_v6_send_check(struct sock *sk, int len, struct sk_buff *skb)
         struct ipv6_pinfo *np = inet6_sk(sk);
         struct tcphdr *th = skb->h.th;
 
-        if (skb->ip_summed == CHECKSUM_HW) {
+        if (skb->ip_summed == CHECKSUM_PARTIAL) {
                 th->check = ~csum_ipv6_magic(&np->saddr, &np->daddr, len, IPPROTO_TCP,  0);
                 skb->csum = offsetof(struct tcphdr, check);
         } else {
@@ -570,7 +570,7 @@ static int tcp_v6_gso_send_check(struct sk_buff *skb)
         th->check = ~csum_ipv6_magic(&ipv6h->saddr, &ipv6h->daddr, skb->len,
                                      IPPROTO_TCP, 0);
         skb->csum = offsetof(struct tcphdr, check);
-        skb->ip_summed = CHECKSUM_HW;
+        skb->ip_summed = CHECKSUM_PARTIAL;
         return 0;
 }
 
@@ -1033,7 +1033,7 @@ out:
 
 static int tcp_v6_checksum_init(struct sk_buff *skb)
 {
-        if (skb->ip_summed == CHECKSUM_HW) {
+        if (skb->ip_summed == CHECKSUM_COMPLETE) {
                 if (!tcp_v6_check(skb->h.th,skb->len,&skb->nh.ipv6h->saddr,
                                   &skb->nh.ipv6h->daddr,skb->csum)) {
                         skb->ip_summed = CHECKSUM_UNNECESSARY;
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 82c7c9cde2a8..780b89f6dfcc 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -475,7 +475,7 @@ static int udpv6_rcv(struct sk_buff **pskb)
                 uh = skb->h.uh;
         }
 
-        if (skb->ip_summed == CHECKSUM_HW &&
+        if (skb->ip_summed == CHECKSUM_COMPLETE &&
             !csum_ipv6_magic(saddr, daddr, ulen, IPPROTO_UDP, skb->csum))
                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 
diff --git a/net/ipv6/xfrm6_output.c b/net/ipv6/xfrm6_output.c
index c8c8b44a0f58..6d111743e508 100644
--- a/net/ipv6/xfrm6_output.c
+++ b/net/ipv6/xfrm6_output.c
@@ -41,8 +41,8 @@ static int xfrm6_output_one(struct sk_buff *skb)
         struct xfrm_state *x = dst->xfrm;
         int err;
         
-        if (skb->ip_summed == CHECKSUM_HW) {
-                err = skb_checksum_help(skb, 0);
+        if (skb->ip_summed == CHECKSUM_PARTIAL) {
+                err = skb_checksum_help(skb);
                 if (err)
                         goto error_nolock;
         }
diff --git a/net/netfilter/nf_conntrack_proto_tcp.c b/net/netfilter/nf_conntrack_proto_tcp.c
index af8adcba23a7..308d2abd7ee5 100644
--- a/net/netfilter/nf_conntrack_proto_tcp.c
+++ b/net/netfilter/nf_conntrack_proto_tcp.c
@@ -823,8 +823,7 @@ static int tcp_error(struct sk_buff *skb,
   
         /* Checksum invalid? Ignore.
          * We skip checking packets on the outgoing path
-         * because the semantic of CHECKSUM_HW is different there 
-         * and moreover root might send raw packets.
+         * because the checksum is assumed to be correct.
          */
         /* FIXME: Source route IP option packets --RR */
         if (nf_conntrack_checksum &&
diff --git a/net/netfilter/nf_conntrack_proto_udp.c b/net/netfilter/nf_conntrack_proto_udp.c
index ae07ebe3ab37..d36e03139e8b 100644
--- a/net/netfilter/nf_conntrack_proto_udp.c
+++ b/net/netfilter/nf_conntrack_proto_udp.c
@@ -131,8 +131,7 @@ static int udp_error(struct sk_buff *skb, unsigned int dataoff,
 
         /* Checksum invalid? Ignore.
          * We skip checking packets on the outgoing path
-         * because the semantic of CHECKSUM_HW is different there
-         * and moreover root might send raw packets.
+         * because the checksum is assumed to be correct.
          * FIXME: Source route IP option packets --RR */
         if (nf_conntrack_checksum &&
             ((pf == PF_INET && hooknum == NF_IP_PRE_ROUTING) ||
diff --git a/net/netfilter/nfnetlink_queue.c b/net/netfilter/nfnetlink_queue.c
index 49ef41e34c48..eddfbe4441a2 100644
--- a/net/netfilter/nfnetlink_queue.c
+++ b/net/netfilter/nfnetlink_queue.c
@@ -377,9 +377,9 @@ nfqnl_build_packet_message(struct nfqnl_instance *queue,
                 break;
         
         case NFQNL_COPY_PACKET:
-                if (entskb->ip_summed == CHECKSUM_HW &&
-                    (*errp = skb_checksum_help(entskb,
-                                               outdev == NULL))) {
+                if ((entskb->ip_summed == CHECKSUM_PARTIAL ||
+                     entskb->ip_summed == CHECKSUM_COMPLETE) &&
+                    (*errp = skb_checksum_help(entskb))) {
                         spin_unlock_bh(&queue->lock);
                         return NULL;
                 }
diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index 4172a5235916..300215bdbf46 100644
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -586,7 +586,7 @@ static int tpacket_rcv(struct sk_buff *skb, struct net_device *dev, struct packe
                 else if (skb->pkt_type == PACKET_OUTGOING) {
                         /* Special case: outgoing packets have ll header at head */
                         skb_pull(skb, skb->nh.raw - skb->data);
-                        if (skb->ip_summed == CHECKSUM_HW)
+                        if (skb->ip_summed == CHECKSUM_PARTIAL)
                                 status |= TP_STATUS_CSUMNOTREADY;
                 }
         }
diff --git a/net/sched/sch_netem.c b/net/sched/sch_netem.c
index a08ec4c7c55d..45939bafbdf8 100644
--- a/net/sched/sch_netem.c
+++ b/net/sched/sch_netem.c
@@ -192,8 +192,8 @@ static int netem_enqueue(struct sk_buff *skb, struct Qdisc *sch)
          */
         if (q->corrupt && q->corrupt >= get_crandom(&q->corrupt_cor)) {
                 if (!(skb = skb_unshare(skb, GFP_ATOMIC))
-                    || (skb->ip_summed == CHECKSUM_HW
-                        && skb_checksum_help(skb, 0))) {
+                    || (skb->ip_summed == CHECKSUM_PARTIAL
+                        && skb_checksum_help(skb))) {
                         sch->qstats.drops++;
                         return NET_XMIT_DROP;
                 }
diff --git a/net/sunrpc/socklib.c b/net/sunrpc/socklib.c
index eb330d4f66d6..6f17527b9e69 100644
--- a/net/sunrpc/socklib.c
+++ b/net/sunrpc/socklib.c
@@ -168,7 +168,7 @@ int csum_partial_copy_to_xdr(struct xdr_buf *xdr, struct sk_buff *skb)
                 return -1;
         if ((unsigned short)csum_fold(desc.csum))
                 return -1;
-        if (unlikely(skb->ip_summed == CHECKSUM_HW))
+        if (unlikely(skb->ip_summed == CHECKSUM_COMPLETE))
                 netdev_rx_csum_fault(skb->dev);
         return 0;
 no_checksum: