net: Fix drivers advertising HW_CSUM feature to use csum_start

Some drivers are using skb_transport_offset(skb) instead of skb->csum_start
for NETIF_F_HW_CSUM offload.  This does not matter now, but if someone
implements checksumming of encapsulated packets then this will break silently.

TSO output paths are left as they are, since they are for IP+TCP only
(might be worth converting though).

Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: David S. Miller <davem@davemloft.net>

14 files changed, 15 insertions, 15 deletions

diff --git a/drivers/net/atl1c/atl1c_main.c b/drivers/net/atl1c/atl1c_main.c
index 09b099b..e48ea95 100644
--- a/drivers/net/atl1c/atl1c_main.c
+++ b/drivers/net/atl1c/atl1c_main.c
@@ -2078,7 +2078,7 @@ static int atl1c_tso_csum(struct atl1c_adapter *adapter,
 check_sum:
 	if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
 		u8 css, cso;
-		cso = skb_transport_offset(skb);
+		cso = skb_checksum_start_offset(skb);
 
 		if (unlikely(cso & 0x1)) {
 			if (netif_msg_tx_err(adapter))
diff --git a/drivers/net/atl1e/atl1e_main.c b/drivers/net/atl1e/atl1e_main.c
index ef6349bf..e28f8ba 100644
--- a/drivers/net/atl1e/atl1e_main.c
+++ b/drivers/net/atl1e/atl1e_main.c
@@ -1649,7 +1649,7 @@ check_sum:
 	if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
 		u8 css, cso;
 
-		cso = skb_transport_offset(skb);
+		cso = skb_checksum_start_offset(skb);
 		if (unlikely(cso & 0x1)) {
 			netdev_err(adapter->netdev,
 				   "payload offset should not ant event number\n");
diff --git a/drivers/net/cassini.c b/drivers/net/cassini.c
index a8a32bc..73502fe 100644
--- a/drivers/net/cassini.c
+++ b/drivers/net/cassini.c
@@ -2788,7 +2788,7 @@ static inline int cas_xmit_tx_ringN(struct cas *cp, int ring,
 
 	ctrl = 0;
 	if (skb->ip_summed == CHECKSUM_PARTIAL) {
-		const u64 csum_start_off = skb_transport_offset(skb);
+		const u64 csum_start_off = skb_checksum_start_offset(skb);
 		const u64 csum_stuff_off = csum_start_off + skb->csum_offset;
 
 		ctrl =  TX_DESC_CSUM_EN |
diff --git a/drivers/net/e1000/e1000_main.c b/drivers/net/e1000/e1000_main.c
index 491bf2a..340e12d 100644
--- a/drivers/net/e1000/e1000_main.c
+++ b/drivers/net/e1000/e1000_main.c
@@ -2726,7 +2726,7 @@ static bool e1000_tx_csum(struct e1000_adapter *adapter,
 		break;
 	}
 
-	css = skb_transport_offset(skb);
+	css = skb_checksum_start_offset(skb);
 
 	i = tx_ring->next_to_use;
 	buffer_info = &tx_ring->buffer_info[i];
diff --git a/drivers/net/e1000e/netdev.c b/drivers/net/e1000e/netdev.c
index 02d093d..a45dafd 100644
--- a/drivers/net/e1000e/netdev.c
+++ b/drivers/net/e1000e/netdev.c
@@ -4473,7 +4473,7 @@ static bool e1000_tx_csum(struct e1000_adapter *adapter, struct sk_buff *skb)
 		break;
 	}
 
-	css = skb_transport_offset(skb);
+	css = skb_checksum_start_offset(skb);
 
 	i = tx_ring->next_to_use;
 	buffer_info = &tx_ring->buffer_info[i];
diff --git a/drivers/net/enic/enic_main.c b/drivers/net/enic/enic_main.c
index 77d9138..9710047 100644
--- a/drivers/net/enic/enic_main.c
+++ b/drivers/net/enic/enic_main.c
@@ -702,7 +702,7 @@ static inline void enic_queue_wq_skb_csum_l4(struct enic *enic,
 {
 	unsigned int head_len = skb_headlen(skb);
 	unsigned int len_left = skb->len - head_len;
-	unsigned int hdr_len = skb_transport_offset(skb);
+	unsigned int hdr_len = skb_checksum_start_offset(skb);
 	unsigned int csum_offset = hdr_len + skb->csum_offset;
 	int eop = (len_left == 0);
 
diff --git a/drivers/net/ixgb/ixgb_main.c b/drivers/net/ixgb/ixgb_main.c
index b021798..5639ccc 100644
--- a/drivers/net/ixgb/ixgb_main.c
+++ b/drivers/net/ixgb/ixgb_main.c
@@ -1262,7 +1262,7 @@ ixgb_tx_csum(struct ixgb_adapter *adapter, struct sk_buff *skb)
 
 	if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
 		struct ixgb_buffer *buffer_info;
-		css = skb_transport_offset(skb);
+		css = skb_checksum_start_offset(skb);
 		cso = css + skb->csum_offset;
 
 		i = adapter->tx_ring.next_to_use;
diff --git a/drivers/net/ll_temac_main.c b/drivers/net/ll_temac_main.c
index 9f8e702..e2c2a72 100644
--- a/drivers/net/ll_temac_main.c
+++ b/drivers/net/ll_temac_main.c
@@ -692,7 +692,7 @@ static int temac_start_xmit(struct sk_buff *skb, struct net_device *ndev)
 
 	cur_p->app0 = 0;
 	if (skb->ip_summed == CHECKSUM_PARTIAL) {
-		unsigned int csum_start_off = skb_transport_offset(skb);
+		unsigned int csum_start_off = skb_checksum_start_offset(skb);
 		unsigned int csum_index_off = csum_start_off + skb->csum_offset;
 
 		cur_p->app0 |= 1; /* TX Checksum Enabled */
diff --git a/drivers/net/myri10ge/myri10ge.c b/drivers/net/myri10ge/myri10ge.c
index 1ce0207..a37fcf1 100644
--- a/drivers/net/myri10ge/myri10ge.c
+++ b/drivers/net/myri10ge/myri10ge.c
@@ -2736,7 +2736,7 @@ again:
 	odd_flag = 0;
 	flags = (MXGEFW_FLAGS_NO_TSO | MXGEFW_FLAGS_FIRST);
 	if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
-		cksum_offset = skb_transport_offset(skb);
+		cksum_offset = skb_checksum_start_offset(skb);
 		pseudo_hdr_offset = cksum_offset + skb->csum_offset;
 		/* If the headers are excessively large, then we must
 		 * fall back to a software checksum */
diff --git a/drivers/net/niu.c b/drivers/net/niu.c
index f64c424..2541321 100644
--- a/drivers/net/niu.c
+++ b/drivers/net/niu.c
@@ -6589,7 +6589,7 @@ static u64 niu_compute_tx_flags(struct sk_buff *skb, struct ethhdr *ehdr,
 			     (ip_proto == IPPROTO_UDP ?
 			      TXHDR_CSUM_UDP : TXHDR_CSUM_SCTP));
 
-		start = skb_transport_offset(skb) -
+		start = skb_checksum_start_offset(skb) -
 			(pad_bytes + sizeof(struct tx_pkt_hdr));
 		stuff = start + skb->csum_offset;
 
diff --git a/drivers/net/skge.c b/drivers/net/skge.c
index 8c1404b..50815fb 100644
--- a/drivers/net/skge.c
+++ b/drivers/net/skge.c
@@ -2764,7 +2764,7 @@ static netdev_tx_t skge_xmit_frame(struct sk_buff *skb,
 	td->dma_hi = map >> 32;
 
 	if (skb->ip_summed == CHECKSUM_PARTIAL) {
-		const int offset = skb_transport_offset(skb);
+		const int offset = skb_checksum_start_offset(skb);
 
 		/* This seems backwards, but it is what the sk98lin
 		 * does.  Looks like hardware is wrong?
diff --git a/drivers/net/sungem.c b/drivers/net/sungem.c
index 9e992ca..1c5408f 100644
--- a/drivers/net/sungem.c
+++ b/drivers/net/sungem.c
@@ -1004,7 +1004,7 @@ static netdev_tx_t gem_start_xmit(struct sk_buff *skb,
 
 	ctrl = 0;
 	if (skb->ip_summed == CHECKSUM_PARTIAL) {
-		const u64 csum_start_off = skb_transport_offset(skb);
+		const u64 csum_start_off = skb_checksum_start_offset(skb);
 		const u64 csum_stuff_off = csum_start_off + skb->csum_offset;
 
 		ctrl = (TXDCTRL_CENAB |
diff --git a/drivers/net/sunhme.c b/drivers/net/sunhme.c
index 5e28c41..55bbb9c 100644
--- a/drivers/net/sunhme.c
+++ b/drivers/net/sunhme.c
@@ -2266,7 +2266,7 @@ static netdev_tx_t happy_meal_start_xmit(struct sk_buff *skb,
 
 	tx_flags = TXFLAG_OWN;
 	if (skb->ip_summed == CHECKSUM_PARTIAL) {
-		const u32 csum_start_off = skb_transport_offset(skb);
+		const u32 csum_start_off = skb_checksum_start_offset(skb);
 		const u32 csum_stuff_off = csum_start_off + skb->csum_offset;
 
 		tx_flags = (TXFLAG_OWN | TXFLAG_CSENABLE |
diff --git a/drivers/net/vmxnet3/vmxnet3_drv.c b/drivers/net/vmxnet3/vmxnet3_drv.c
index 0169be7..23154cf 100644
--- a/drivers/net/vmxnet3/vmxnet3_drv.c
+++ b/drivers/net/vmxnet3/vmxnet3_drv.c
@@ -798,7 +798,7 @@ vmxnet3_parse_and_copy_hdr(struct sk_buff *skb, struct vmxnet3_tx_queue *tq,
 {
 	struct Vmxnet3_TxDataDesc *tdd;
 
-	if (ctx->mss) {
+	if (ctx->mss) {	/* TSO */
 		ctx->eth_ip_hdr_size = skb_transport_offset(skb);
 		ctx->l4_hdr_size = ((struct tcphdr *)
 				   skb_transport_header(skb))->doff * 4;
@@ -807,7 +807,7 @@ vmxnet3_parse_and_copy_hdr(struct sk_buff *skb, struct vmxnet3_tx_queue *tq,
 		unsigned int pull_size;
 
 		if (skb->ip_summed == CHECKSUM_PARTIAL) {
-			ctx->eth_ip_hdr_size = skb_transport_offset(skb);
+			ctx->eth_ip_hdr_size = skb_checksum_start_offset(skb);
 
 			if (ctx->ipv4) {
 				struct iphdr *iph = (struct iphdr *)