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net: fec: init MAC prior to mii bus probe 

Below case causes mii bus probe failed:
ifconfig eth0 down -> suspend/resume with Mega/fax mix off -> ifconfig eth0 up

In i.MX6SX/i.MX7D chip, Mega/fast mix off feature is supported that means most of
SOC power will be off including ENET MAC for power saving. Once ENET MAC power
off, all initialized MAC registers reset to default, so in the case, it must
init MAC prior to mii bus probe.

Signed-off-by: Fugang Duan <B38611@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Nimrod Andy 2015-06-23 15:32:51 +08:00 committed by David S. Miller
parent 42bcce87d7
commit 55dd275366
1 changed files with 3 additions and 1 deletions
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4
drivers/net/ethernet/freescale/fec_main.c
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@ -2856,12 +2856,14 @@ fec_enet_open(struct net_device *ndev)
if (ret)
goto err_enet_alloc;
/* Init MAC prior to mii bus probe */
fec_restart(ndev);
/* Probe and connect to PHY when open the interface */
ret = fec_enet_mii_probe(ndev);
if (ret)
goto err_enet_mii_probe;
fec_restart(ndev);
napi_enable(&fep->napi);
phy_start(fep->phy_dev);
netif_tx_start_all_queues(ndev);