net: myri10ge: use skb_list_walk_safe helper for gso segments

This is a straight-forward conversion case for the new function, and
while we're at it, we can remove a null write to skb->next by replacing
it with skb_mark_not_on_list.
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/myricom/myri10ge/myri10ge.c

@@ -2892,7 +2892,7 @@ static netdev_tx_t myri10ge_xmit(struct sk_buff *skb,
 static netdev_tx_t myri10ge_sw_tso(struct sk_buff *skb,
 					 struct net_device *dev)
 {
-	struct sk_buff *segs, *curr;
+	struct sk_buff *segs, *curr, *next;
 	struct myri10ge_priv *mgp = netdev_priv(dev);
 	struct myri10ge_slice_state *ss;
 	netdev_tx_t status;
@@ -2901,10 +2901,8 @@ static netdev_tx_t myri10ge_sw_tso(struct sk_buff *skb,
 	if (IS_ERR(segs))
 		goto drop;
 
-	while (segs) {
-		curr = segs;
-		segs = segs->next;
-		curr->next = NULL;
+	skb_list_walk_safe(segs, curr, next) {
+		skb_mark_not_on_list(curr);
 		status = myri10ge_xmit(curr, dev);
 		if (status != 0) {
 			dev_kfree_skb_any(curr);