igb: ignore EEPROM APME check when shutting down serdes link

Checking the EEPROM APME state unnecessarily prevents the link from
shutting down. The standard power down routines should be
sufficient to determine whether the serdes link can power down
when going into D3.

Signed-off-by: Nicholas Nunley <nicholasx.d.nunley@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/igb/e1000_82575.c

@@ -791,27 +791,12 @@ static s32 igb_get_pcs_speed_and_duplex_82575(struct e1000_hw *hw, u16 *speed,
 void igb_shutdown_serdes_link_82575(struct e1000_hw *hw)
 {
 	u32 reg;
-	u16 eeprom_data = 0;
 
-	if (hw->phy.media_type != e1000_media_type_internal_serdes ||
+	if (hw->phy.media_type != e1000_media_type_internal_serdes &&
 	    igb_sgmii_active_82575(hw))
 		return;
 
-	if (hw->bus.func == E1000_FUNC_0)
-		hw->nvm.ops.read(hw, NVM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
-	else if (hw->mac.type == e1000_82580)
-		hw->nvm.ops.read(hw, NVM_INIT_CONTROL3_PORT_A +
-		                 NVM_82580_LAN_FUNC_OFFSET(hw->bus.func), 1,
-		                 &eeprom_data);
-	else if (hw->bus.func == E1000_FUNC_1)
-		hw->nvm.ops.read(hw, NVM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
-
-	/*
-	 * If APM is not enabled in the EEPROM and management interface is
-	 * not enabled, then power down.
-	 */
-	if (!(eeprom_data & E1000_NVM_APME_82575) &&
-	    !igb_enable_mng_pass_thru(hw)) {
+	if (!igb_enable_mng_pass_thru(hw)) {
 		/* Disable PCS to turn off link */
 		reg = rd32(E1000_PCS_CFG0);
 		reg &= ~E1000_PCS_CFG_PCS_EN;
@@ -826,8 +811,6 @@ void igb_shutdown_serdes_link_82575(struct e1000_hw *hw)
 		wrfl();
 		msleep(1);
 	}
-
-	return;
 }
 
 /**