net: r8152: 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/usb/r8152.c

@@ -1897,8 +1897,8 @@ static void r8152_csum_workaround(struct r8152 *tp, struct sk_buff *skb,
 {
 	if (skb_shinfo(skb)->gso_size) {
 		netdev_features_t features = tp->netdev->features;
+		struct sk_buff *segs, *seg, *next;
 		struct sk_buff_head seg_list;
-		struct sk_buff *segs, *nskb;
 
 		features &= ~(NETIF_F_SG | NETIF_F_IPV6_CSUM | NETIF_F_TSO6);
 		segs = skb_gso_segment(skb, features);
@@ -1907,12 +1907,10 @@ static void r8152_csum_workaround(struct r8152 *tp, struct sk_buff *skb,
 
 		__skb_queue_head_init(&seg_list);
 
-		do {
-			nskb = segs;
-			segs = segs->next;
-			nskb->next = NULL;
-			__skb_queue_tail(&seg_list, nskb);
-		} while (segs);
+		skb_list_walk_safe(segs, seg, next) {
+			skb_mark_not_on_list(seg);
+			__skb_queue_tail(&seg_list, seg);
+		}
 
 		skb_queue_splice(&seg_list, list);
 		dev_kfree_skb(skb);