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>

2 files changed, 2 insertions, 2 deletions

diff --git a/net/nfc/llcp_sock.c b/net/nfc/llcp_sock.c
index 51f077a92fa9..83bc785d5855 100644
--- a/net/nfc/llcp_sock.c
+++ b/net/nfc/llcp_sock.c
@@ -832,7 +832,7 @@ static int llcp_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
         copied = min_t(unsigned int, rlen, len);
 
         cskb = skb;
-        if (skb_copy_datagram_iovec(cskb, 0, msg->msg_iov, copied)) {
+        if (skb_copy_datagram_msg(cskb, 0, msg, copied)) {
                 if (!(flags & MSG_PEEK))
                         skb_queue_head(&sk->sk_receive_queue, skb);
                 return -EFAULT;
diff --git a/net/nfc/rawsock.c b/net/nfc/rawsock.c
index 11c3544ea546..9d7d2b7ba5e4 100644
--- a/net/nfc/rawsock.c
+++ b/net/nfc/rawsock.c
@@ -269,7 +269,7 @@ static int rawsock_recvmsg(struct kiocb *iocb, struct socket *sock,
                 copied = len;
         }
 
-        rc = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
+        rc = skb_copy_datagram_msg(skb, 0, msg, copied);
 
         skb_free_datagram(sk, skb);