[TCP]: Add tcp_for_write_queue_from_safe and use it in mtu_probe
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index b41176f..7d8583a 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -1350,9 +1350,7 @@
tcp_insert_write_queue_before(nskb, skb, sk);
len = 0;
- while (len < probe_size) {
- next = tcp_write_queue_next(sk, skb);
-
+ tcp_for_write_queue_from_safe(skb, next, sk) {
copy = min_t(int, skb->len, probe_size - len);
if (nskb->ip_summed)
skb_copy_bits(skb, 0, skb_put(nskb, copy), copy);
@@ -1381,7 +1379,9 @@
}
len += copy;
- skb = next;
+
+ if (len >= probe_size)
+ break;
}
tcp_init_tso_segs(sk, nskb, nskb->len);