tcp: fix a size_t < 0 comparison in tcp_read_sock

<used> should be of type int (not size_t) since recv_actor can return
negative values and it is also used in a < 0 comparison.

Signed-off-by: Octavian Purdila <opurdila@ixiacom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index de53024664e4bb5ee62be7342d1598366eb6713d..1d723de18686a9ff80bb82876fac7a1ee7fb013e 100644 (file)
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -1209,7 +1209,8 @@ int tcp_read_sock(struct sock *sk, read_descriptor_t *desc,
                return -ENOTCONN;
        while ((skb = tcp_recv_skb(sk, seq, &offset)) != NULL) {
                if (offset < skb->len) {
-                       size_t used, len;
+                       int used;
+                       size_t len;
 
                        len = skb->len - offset;
                        /* Stop reading if we hit a patch of urgent data */