[net-next PATCH 1/6] ixgbe: Enable ACPI WoL capabilities for 82599

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

From: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>

The 82599 KX4 device defaults to legacy power management, or APME.  This
puts the device into ACPI mode, which allows more robust WoL setups to
work properly.

Signed-off-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---

 drivers/net/ixgbe/ixgbe_main.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/drivers/net/ixgbe/ixgbe_main.c b/drivers/net/ixgbe/ixgbe_main.c
index de70a2d..043acab 100644
--- a/drivers/net/ixgbe/ixgbe_main.c
+++ b/drivers/net/ixgbe/ixgbe_main.c
@@ -5282,6 +5282,9 @@ static int __devinit ixgbe_probe(struct pci_dev *pdev,
 	case IXGBE_DEV_ID_82599_KX4:
 		adapter->wol = (IXGBE_WUFC_MAG | IXGBE_WUFC_EX |
 		                IXGBE_WUFC_MC | IXGBE_WUFC_BC);
+		/* Enable ACPI wakeup in GRC */
+		IXGBE_WRITE_REG(hw, IXGBE_GRC,
+		             (IXGBE_READ_REG(hw, IXGBE_GRC) & ~IXGBE_GRC_APME));
 		break;
 	default:
 		adapter->wol = 0;