caif: use pskb_put() instead of reimplementing its functionality

Also remove the warning for fragmented packets -- skb_cow_data() will
linearize the buffer, removing all fragments.

Signed-off-by: Mathias Krause <mathias.krause@secunet.com>
Cc: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 11 deletions

diff --git a/net/caif/cfpkt_skbuff.c b/net/caif/cfpkt_skbuff.c
index 6493351f39c6..1be0b521ac49 100644
--- a/net/caif/cfpkt_skbuff.c
+++ b/net/caif/cfpkt_skbuff.c
@@ -203,20 +203,10 @@ int cfpkt_add_body(struct cfpkt *pkt, const void *data, u16 len)
                         PKT_ERROR(pkt, "cow failed\n");
                         return -EPROTO;
                 }
-                /*
-                 * Is the SKB non-linear after skb_cow_data()? If so, we are
-                 * going to add data to the last SKB, so we need to adjust
-                 * lengths of the top SKB.
-                 */
-                if (lastskb != skb) {
-                        pr_warn("Packet is non-linear\n");
-                        skb->len += len;
-                        skb->data_len += len;
-                }
         }
 
         /* All set to put the last SKB and optionally write data there. */
-        to = skb_put(lastskb, len);
+        to = pskb_put(skb, lastskb, len);
         if (likely(data))
                 memcpy(to, data, len);
         return 0;