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net: fec: reset fep link status in suspend function

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On some i.MX6 serial boards, phy power and refrence clock are supplied
or controlled by SOC. When do suspend/resume test, the power and clock
are disabled, so phy device link down.

For current driver, fep->link is still up status, which cause extra operation
like below code. To avoid the dumy operation, we set fep->link to down when
phy device is real down.
...
if (fep->link) {
	napi_disable(&fep->napi);
	netif_tx_lock_bh(ndev);
	fec_stop(ndev);
	netif_tx_unlock_bh(ndev);
	napi_enable(&fep->napi);
	fep->link = phy_dev->link;
	status_change = 1;
}
...

Signed-off-by: Fugang Duan <B38611@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Nimrod Andy 2014-12-11 09:20:31 +08:00 committed by David S. Miller
parent 198bf1b046
commit 858eeb7d9c
1 changed files with 6 additions and 0 deletions
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6
drivers/net/ethernet/freescale/fec_main.c
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@ -3332,6 +3332,12 @@ static int __maybe_unused fec_suspend(struct device *dev)
if (fep->reg_phy)
regulator_disable(fep->reg_phy);
/* SOC supply clock to phy, when clock is disabled, phy link down
* SOC control phy regulator, when regulator is disabled, phy link down
*/
if (fep->clk_enet_out || fep->reg_phy)
fep->link = 0;
return 0;
}