net: remove unnecessary carrier status check

Since netif_carrier_on() will do nothing if device's carrier is already
on, so it's unnecessary to do carrier status check.

It's the same for netif_carrier_off().

Signed-off-by: Zhang Shengju <zhangshengju@cmss.chinamobile.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/core/dev.c b/net/core/dev.c
index 3361ee8..8371a01 100644 (file)
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -7245,13 +7245,10 @@ void netif_stacked_transfer_operstate(const struct net_device *rootdev,
        else
                netif_dormant_off(dev);
 
-       if (netif_carrier_ok(rootdev)) {
-               if (!netif_carrier_ok(dev))
-                       netif_carrier_on(dev);
-       } else {
-               if (netif_carrier_ok(dev))
-                       netif_carrier_off(dev);
-       }
+       if (netif_carrier_ok(rootdev))
+               netif_carrier_on(dev);
+       else
+               netif_carrier_off(dev);
 }
 EXPORT_SYMBOL(netif_stacked_transfer_operstate);