[net-next PATCH 09/11] ixgbe: Two small fixes for 82599 when bringing the device down and for WoL

[Jeff Kirsher <jeffrey.t.kirsher@intel.com>]

From: PJ Waskiewicz <peter.p.waskiewicz.jr@intel.com>

The Tx DMA unit should be disabled when bringing the device down.  Also,
the KX4 device with 82599 supports WoL, so we should clear the Wake Up
Status (WUS) after a PCIe slot reset.

Signed-off-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Acked-by: Mallikarjuna R Chilakala <mallikarjuna.chilakala@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---

 drivers/net/ixgbe/ixgbe_main.c |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)

diff --git a/drivers/net/ixgbe/ixgbe_main.c b/drivers/net/ixgbe/ixgbe_main.c
index 8821c5f..ef0b99a 100644
--- a/drivers/net/ixgbe/ixgbe_main.c
+++ b/drivers/net/ixgbe/ixgbe_main.c
@@ -2558,6 +2558,11 @@ void ixgbe_down(struct ixgbe_adapter *adapter)
 		IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(j),
 		                (txdctl & ~IXGBE_TXDCTL_ENABLE));
 	}
+	/* Disable the Tx DMA engine on 82599 */
+	if (hw->mac.type == ixgbe_mac_82599EB)
+		IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL,
+		                (IXGBE_READ_REG(hw, IXGBE_DMATXCTL) &
+		                 ~IXGBE_DMATXCTL_TE));
 
 	netif_carrier_off(netdev);
 
@@ -4795,7 +4800,7 @@ static pci_ers_result_t ixgbe_io_slot_reset(struct pci_dev *pdev)
 		pci_enable_wake(pdev, PCI_D3cold, 0);
 
 		ixgbe_reset(adapter);
-
+		IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
 		result = PCI_ERS_RESULT_RECOVERED;
 	}