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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>
This commit is contained in:
Zhang Shengju 2017-04-26 17:49:38 +08:00 committed by David S. Miller
parent 8ecbc40ada
commit 0575c86b5d
1 changed files with 4 additions and 7 deletions
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11
net/core/dev.c
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@ -7245,13 +7245,10 @@ void netif_stacked_transfer_operstate(const struct net_device *rootdev,
else else
netif_dormant_off(dev); netif_dormant_off(dev);
if (netif_carrier_ok(rootdev)) { if (netif_carrier_ok(rootdev))
if (!netif_carrier_ok(dev)) netif_carrier_on(dev);
netif_carrier_on(dev); else
} else { netif_carrier_off(dev);
if (netif_carrier_ok(dev))
netif_carrier_off(dev);
}
} }
EXPORT_SYMBOL(netif_stacked_transfer_operstate); EXPORT_SYMBOL(netif_stacked_transfer_operstate);