From a92a2814554494738782ea5a5d386302b9dd5aed Mon Sep 17 00:00:00 2001
From: Axel Lin <axel.lin@ingics.com>
Date: Sun, 2 Jul 2017 23:39:01 +0800
Subject: [PATCH] PPP, VJ: Use pbuf_clone to replace pbuf_alloc+pbuf_copy

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: goldsimon <goldsimon@gmx.de>
---
 src/netif/ppp/vj.c | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/src/netif/ppp/vj.c b/src/netif/ppp/vj.c
index 3fc1a4c9..90f620f0 100644
--- a/src/netif/ppp/vj.c
+++ b/src/netif/ppp/vj.c
@@ -202,16 +202,11 @@ vj_compress_tcp(struct vjcompress *comp, struct pbuf **pb)
 
   /* TCP stack requires that we don't change the packet payload, therefore we copy
    * the whole packet before compression. */
-  np = pbuf_alloc(PBUF_RAW, np->tot_len, PBUF_POOL);
+  np = pbuf_clone(PBUF_RAW, PBUF_POOL, *pb);
   if (!np) {
     return (TYPE_IP);
   }
 
-  if (pbuf_copy(np, *pb) != ERR_OK) {
-    pbuf_free(np);
-    return (TYPE_IP);
-  }
-
   *pb = np;
   ip = (struct ip_hdr *)np->payload;