net: netfilter: use skb_list_walk_safe helper for gso segments

This is a straight-forward conversion case for the new function, keeping
the flow of the existing code as intact as possible.
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/netfilter/nfnetlink_queue.c

@@ -778,7 +778,7 @@ nfqnl_enqueue_packet(struct nf_queue_entry *entry, unsigned int queuenum)
 {
 	unsigned int queued;
 	struct nfqnl_instance *queue;
-	struct sk_buff *skb, *segs;
+	struct sk_buff *skb, *segs, *nskb;
 	int err = -ENOBUFS;
 	struct net *net = entry->state.net;
 	struct nfnl_queue_net *q = nfnl_queue_pernet(net);
@@ -815,8 +815,7 @@ nfqnl_enqueue_packet(struct nf_queue_entry *entry, unsigned int queuenum)
 		goto out_err;
 	queued = 0;
 	err = 0;
-	do {
-		struct sk_buff *nskb = segs->next;
+	skb_list_walk_safe(segs, segs, nskb) {
 		if (err == 0)
 			err = __nfqnl_enqueue_packet_gso(net, queue,
 							segs, entry);
@@ -824,8 +823,7 @@ nfqnl_enqueue_packet(struct nf_queue_entry *entry, unsigned int queuenum)
 			queued++;
 		else
 			kfree_skb(segs);
-		segs = nskb;
-	} while (segs);
+	}
 
 	if (queued) {
 		if (err) /* some segments are already queued */