net: fib: Decrease one unnecessary rt cache flush in fib_disable_ip

The func fib_flush already flushes the rt cache if necessary, so it
is not necessary to invoke rt_cache_flush again in fib_disable_ip.

Signed-off-by: Gao Feng <fgao@ikuai8.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c
index 5a0e456b5d5897ff490d3f26748b49bd34785329..39bd1edee67649af86eb582c0ea478713360a506 100644 (file)
--- a/net/ipv4/fib_frontend.c
+++ b/net/ipv4/fib_frontend.c
@@ -1130,7 +1130,8 @@ static void fib_disable_ip(struct net_device *dev, unsigned long event,
 {
        if (fib_sync_down_dev(dev, event, force))
                fib_flush(dev_net(dev));
-       rt_cache_flush(dev_net(dev));
+       else
+               rt_cache_flush(dev_net(dev));
        arp_ifdown(dev);
 }