[PATCH 1/2] e100: power down PHY if WOL is not enabled

[Jiang Wang <Jiang.Wang@riverbed.com>]

Since the interface will not be used after being put down and WOL is disabled,
just power it off.
When bring up the interface, power on the PHY.

Signed-off-by: Jiang Wang <Jiang.Wang@riverbed.com>
---
 drivers/net/ethernet/intel/e100.c |   17 +++++++++++++++++
 1 files changed, 17 insertions(+), 0 deletions(-)

diff --git a/drivers/net/ethernet/intel/e100.c b/drivers/net/ethernet/intel/e100.c
index 5a2fdf7..9824e0a 100644
--- a/drivers/net/ethernet/intel/e100.c
+++ b/drivers/net/ethernet/intel/e100.c
@@ -1449,6 +1449,14 @@ static int e100_phy_init(struct nic *nic)
 		netif_printk(nic, hw, KERN_DEBUG, nic->netdev,
 			     "phy_addr = %d\n", nic->mii.phy_id);
 
+	/* Make sure power to the PHY is enabled */
+	if (!(nic->flags & wol_magic)) {
+		uint16_t phy_data;
+		phy_data = mdio_read(nic->netdev, nic->mii.phy_id, MII_BMCR);
+		phy_data &= ~BMCR_PDOWN;
+		mdio_write(nic->netdev, nic->mii.phy_id, MII_BMCR, phy_data);
+	}
+
 	/* Get phy ID */
 	id_lo = mdio_read(netdev, nic->mii.phy_id, MII_PHYSID1);
 	id_hi = mdio_read(netdev, nic->mii.phy_id, MII_PHYSID2);
@@ -2261,6 +2269,15 @@ static void e100_down(struct nic *nic)
 	napi_disable(&nic->napi);
 	netif_stop_queue(nic->netdev);
 	e100_hw_reset(nic);
+
+	/* If wake on LAN is not enabled, power down the PHY */
+	if (!(nic->flags & wol_magic)) {
+		uint16_t phy_data;
+		phy_data = mdio_read(nic->netdev, nic->mii.phy_id, MII_BMCR);
+		phy_data |= BMCR_PDOWN;
+		mdio_write(nic->netdev, nic->mii.phy_id, MII_BMCR, phy_data);
+	}
+
 	free_irq(nic->pdev->irq, nic->netdev);
 	del_timer_sync(&nic->watchdog);
 	netif_carrier_off(nic->netdev);
-- 
1.7.1