net: Add and use skb_copy_datagram_msg() helper.

This encapsulates all of the skb_copy_datagram_iovec() callers
with call argument signature "skb, offset, msghdr->msg_iov, length".

When we move to iov_iters in the networking, the iov_iter object will
sit in the msghdr.

Having a helper like this means there will be less places to touch
during that transformation.

Based upon descriptions and patch from Al Viro.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 1 deletions

diff --git a/net/netrom/af_netrom.c b/net/netrom/af_netrom.c
index 1b06a1fcf3e8..7e13f6afcd1f 100644
--- a/net/netrom/af_netrom.c
+++ b/net/netrom/af_netrom.c
@@ -1167,7 +1167,7 @@ static int nr_recvmsg(struct kiocb *iocb, struct socket *sock,
                 msg->msg_flags |= MSG_TRUNC;
         }
 
-        er = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
+        er = skb_copy_datagram_msg(skb, 0, msg, copied);
         if (er < 0) {
                 skb_free_datagram(sk, skb);
                 release_sock(sk);