From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Thu, 24 Jun 2010 01:00:22 +0000 (+0000)
Subject: tcp: tso_fragment() might avoid GFP_ATOMIC
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=c4ead4c595cd54cf7b1a184d4f888ce0d7cce7d4;p=GitHub%2FLineageOS%2Fandroid_kernel_samsung_universal7580.git

tcp: tso_fragment() might avoid GFP_ATOMIC

We can pass a gfp argument to tso_fragment() and avoid GFP_ATOMIC
allocations sometimes.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index 51d316dbb05..25ff62e35a6 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -1460,7 +1460,7 @@ int tcp_may_send_now(struct sock *sk)
  * packet has never been sent out before (and thus is not cloned).
  */
 static int tso_fragment(struct sock *sk, struct sk_buff *skb, unsigned int len,
-			unsigned int mss_now)
+			unsigned int mss_now, gfp_t gfp)
 {
 	struct sk_buff *buff;
 	int nlen = skb->len - len;
@@ -1470,7 +1470,7 @@ static int tso_fragment(struct sock *sk, struct sk_buff *skb, unsigned int len,
 	if (skb->len != skb->data_len)
 		return tcp_fragment(sk, skb, len, mss_now);
 
-	buff = sk_stream_alloc_skb(sk, 0, GFP_ATOMIC);
+	buff = sk_stream_alloc_skb(sk, 0, gfp);
 	if (unlikely(buff == NULL))
 		return -ENOMEM;
 
@@ -1768,7 +1768,7 @@ static int tcp_write_xmit(struct sock *sk, unsigned int mss_now, int nonagle,
 						    cwnd_quota);
 
 		if (skb->len > limit &&
-		    unlikely(tso_fragment(sk, skb, limit, mss_now)))
+		    unlikely(tso_fragment(sk, skb, limit, mss_now, gfp)))
 			break;
 
 		TCP_SKB_CB(skb)->when = tcp_time_stamp;