udp: remove redundant variable

The variable 'copied' is used in udp_recvmsg() to emphasize that the passed
'len' is adjusted to fit the actual datagram length. But the same can be
done by adjusting 'len' directly. This patch thus removes the indirection.

Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index 4f7d212..608a544 100644 (file)
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -1117,7 +1117,7 @@ int udp_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
        struct inet_sock *inet = inet_sk(sk);
        struct sockaddr_in *sin = (struct sockaddr_in *)msg->msg_name;
        struct sk_buff *skb;
-       unsigned int ulen, copied;
+       unsigned int ulen;
        int peeked;
        int err;
        int is_udplite = IS_UDPLITE(sk);
@@ -1138,10 +1138,9 @@ try_again:
                goto out;
 
        ulen = skb->len - sizeof(struct udphdr);
-       copied = len;
-       if (copied > ulen)
-               copied = ulen;
-       else if (copied < ulen)
+       if (len > ulen)
+               len = ulen;
+       else if (len < ulen)
                msg->msg_flags |= MSG_TRUNC;
 
        /*
@@ -1150,14 +1149,14 @@ try_again:
         * coverage checksum (UDP-Lite), do it before the copy.
         */
 
-       if (copied < ulen || UDP_SKB_CB(skb)->partial_cov) {
+       if (len < ulen || UDP_SKB_CB(skb)->partial_cov) {
                if (udp_lib_checksum_complete(skb))
                        goto csum_copy_err;
        }
 
        if (skb_csum_unnecessary(skb))
                err = skb_copy_datagram_iovec(skb, sizeof(struct udphdr),
-                                             msg->msg_iov, copied);
+                                             msg->msg_iov, len);
        else {
                err = skb_copy_and_csum_datagram_iovec(skb,
                                                       sizeof(struct udphdr),
@@ -1186,7 +1185,7 @@ try_again:
        if (inet->cmsg_flags)
                ip_cmsg_recv(msg, skb);
 
-       err = copied;
+       err = len;
        if (flags & MSG_TRUNC)
                err = ulen;
 

diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 34efb35..a7af9d6 100644 (file)
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -322,7 +322,7 @@ int udpv6_recvmsg(struct kiocb *iocb, struct sock *sk,
        struct ipv6_pinfo *np = inet6_sk(sk);
        struct inet_sock *inet = inet_sk(sk);
        struct sk_buff *skb;
-       unsigned int ulen, copied;
+       unsigned int ulen;
        int peeked;
        int err;
        int is_udplite = IS_UDPLITE(sk);
@@ -341,10 +341,9 @@ try_again:
                goto out;
 
        ulen = skb->len - sizeof(struct udphdr);
-       copied = len;
-       if (copied > ulen)
-               copied = ulen;
-       else if (copied < ulen)
+       if (len > ulen)
+               len = ulen;
+       else if (len < ulen)
                msg->msg_flags |= MSG_TRUNC;
 
        is_udp4 = (skb->protocol == htons(ETH_P_IP));
@@ -355,14 +354,14 @@ try_again:
         * coverage checksum (UDP-Lite), do it before the copy.
         */
 
-       if (copied < ulen || UDP_SKB_CB(skb)->partial_cov) {
+       if (len < ulen || UDP_SKB_CB(skb)->partial_cov) {
                if (udp_lib_checksum_complete(skb))
                        goto csum_copy_err;
        }
 
        if (skb_csum_unnecessary(skb))
                err = skb_copy_datagram_iovec(skb, sizeof(struct udphdr),
-                                             msg->msg_iov, copied       );
+                                             msg->msg_iov,len);
        else {
                err = skb_copy_and_csum_datagram_iovec(skb, sizeof(struct udphdr), msg->msg_iov);
                if (err == -EINVAL)
@@ -411,7 +410,7 @@ try_again:
                        datagram_recv_ctl(sk, msg, skb);
        }
 
-       err = copied;
+       err = len;
        if (flags & MSG_TRUNC)
                err = ulen;