netdev - [PATCH] net: fib: Decrease one unnecessary rt cache flush in fib_disable

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Date:   Wed, 26 Apr 2017 19:04:04 +0800
From:   gfree.wind@...mail.com
To:     davem@...emloft.net, netdev@...r.kernel.org
Cc:     Gao Feng <fgao@...ai8.com>
Subject: [PATCH] net: fib: Decrease one unnecessary rt cache flush in fib_disable_ip

From: Gao Feng <fgao@...ai8.com>

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@...ai8.com>
---
 net/ipv4/fib_frontend.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c
index 5a0e456..39bd1ed 100644
--- 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);
 }
 
-- 
1.9.1