[patch net-next] rxrpc: checking for IS_ERR() instead of NULL

[Dan Carpenter]

rxrpc_lookup_peer_rcu() returns NULL on error, it never returns error
pointers.

Fixes: be6e6707f6ee ('rxrpc: Rework peer object handling to use hash table and 
RCU')
Signed-off-by: Dan Carpenter <dan.carpen...@oracle.com>

diff --git a/net/rxrpc/input.c b/net/rxrpc/input.c
index 47fb167..e11e4d7 100644
--- a/net/rxrpc/input.c
+++ b/net/rxrpc/input.c
@@ -639,7 +639,7 @@ static struct rxrpc_connection 
*rxrpc_conn_from_local(struct rxrpc_local *local,
        rxrpc_get_addr_from_skb(local, skb, &srx);
        rcu_read_lock();
        peer = rxrpc_lookup_peer_rcu(local, &srx);
-       if (IS_ERR(peer))
+       if (!peer)
                goto cant_find_peer;
 
        trans = rxrpc_find_transport(local, peer);