e1000: Use device_set_wakeup_enable

Since dev->power.should_wakeup bit is used by the PCI core to
decide whether the device should wake up the system from sleep
states, set/unset this bit whenever WOL is enabled/disabled using
e1000_set_wol().  Accordingly, use device_can_wakeup() for checking
if wake-up is supported by the device.

Signed-off-by: "Rafael J. Wysocki" <rjw@sisk.pl>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/e1000/e1000_ethtool.c b/drivers/net/e1000/e1000_ethtool.c
index 6a3893a..c854c96 100644
--- a/drivers/net/e1000/e1000_ethtool.c
+++ b/drivers/net/e1000/e1000_ethtool.c
@@ -1774,7 +1774,8 @@
 
 	/* this function will set ->supported = 0 and return 1 if wol is not
 	 * supported by this hardware */
-	if (e1000_wol_exclusion(adapter, wol))
+	if (e1000_wol_exclusion(adapter, wol) ||
+	    !device_can_wakeup(&adapter->pdev->dev))
 		return;
 
 	/* apply any specific unsupported masks here */
@@ -1811,7 +1812,8 @@
 	if (wol->wolopts & (WAKE_PHY | WAKE_ARP | WAKE_MAGICSECURE))
 		return -EOPNOTSUPP;
 
-	if (e1000_wol_exclusion(adapter, wol))
+	if (e1000_wol_exclusion(adapter, wol) ||
+	    !device_can_wakeup(&adapter->pdev->dev))
 		return wol->wolopts ? -EOPNOTSUPP : 0;
 
 	switch (hw->device_id) {
@@ -1838,6 +1840,8 @@
 	if (wol->wolopts & WAKE_MAGIC)
 		adapter->wol |= E1000_WUFC_MAG;
 
+	device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
+
 	return 0;
 }