From: Nimrod Andy Date: Tue, 23 Jun 2015 07:32:51 +0000 (+0800) Subject: net: fec: init MAC prior to mii bus probe X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=55dd27536671511317d80478904e4510ed1162a1;p=linux-beck.git 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 Signed-off-by: David S. Miller --- diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c index bf4cf3fbb5f2..e464aeaeed2c 100644 --- a/drivers/net/ethernet/freescale/fec_main.c +++ b/drivers/net/ethernet/freescale/fec_main.c @@ -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);