From 9162e7e5197e14c7488c54980d7cbdc2071f8085 Mon Sep 17 00:00:00 2001 From: Ondrej Zary Date: Mon, 30 Jun 2014 18:38:37 +0200 Subject: [PATCH] tlan: Isolate external PHY when using internal PHY When using internal 10 Mbps PHY, isolate the external PHY from MII bus. External PHY must be kept powered up because it passes TX from tlan chip to network. This fixes weird link-loss problems under load with OC-2326 card at 10 Mbps. Signed-off-by: Ondrej Zary Signed-off-by: David S. Miller --- drivers/net/ethernet/ti/tlan.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/net/ethernet/ti/tlan.c b/drivers/net/ethernet/ti/tlan.c index 1f21764fea53..6078342fe3f2 100644 --- a/drivers/net/ethernet/ti/tlan.c +++ b/drivers/net/ethernet/ti/tlan.c @@ -2528,9 +2528,10 @@ static void tlan_phy_power_down(struct net_device *dev) value = MII_GC_PDOWN | MII_GC_LOOPBK | MII_GC_ISOLATE; tlan_mii_sync(dev->base_addr); tlan_mii_write_reg(dev, priv->phy[priv->phy_num], MII_GEN_CTL, value); - if ((priv->phy_num == 0) && - (priv->phy[1] != TLAN_PHY_NONE) && - (!(priv->adapter->flags & TLAN_ADAPTER_USE_INTERN_10))) { + if ((priv->phy_num == 0) && (priv->phy[1] != TLAN_PHY_NONE)) { + /* if using internal PHY, the external PHY must be powered on */ + if (priv->adapter->flags & TLAN_ADAPTER_USE_INTERN_10) + value = MII_GC_ISOLATE; /* just isolate it from MII */ tlan_mii_sync(dev->base_addr); tlan_mii_write_reg(dev, priv->phy[1], MII_GEN_CTL, value); } -- 2.20.1