From be63a21c9573fbf88106ff0f030da5974551257b Mon Sep 17 00:00:00 2001
From: Stephen Hemminger <stephen.hemminger@vyatta.com>
Date: Tue, 15 Jan 2008 11:29:29 -0800
Subject: [PATCH] Revert "sky2: remove check for PCI wakeup setting from BIOS"

This reverts commit 84cd2dfb04d23a961c5f537baa243fa54d0987ac.

Some BIOS's break if Wake On Lan is enabled, and the machine
can't boot. Better to have some user's have to call ethtool to
enable WOL than to break a single user's boot.

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/net/sky2.c | 24 +++++++++++++++++++-----
 1 file changed, 19 insertions(+), 5 deletions(-)

diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c
index 7023bbe545ee..bc15940ce1bc 100644
--- a/drivers/net/sky2.c
+++ b/drivers/net/sky2.c
@@ -3949,7 +3949,7 @@ static __exit void sky2_debug_cleanup(void)
 /* Initialize network device */
 static __devinit struct net_device *sky2_init_netdev(struct sky2_hw *hw,
 						     unsigned port,
-						     int highmem)
+						     int highmem, int wol)
 {
 	struct sky2_port *sky2;
 	struct net_device *dev = alloc_etherdev(sizeof(*sky2));
@@ -3989,7 +3989,7 @@ static __devinit struct net_device *sky2_init_netdev(struct sky2_hw *hw,
 	sky2->speed = -1;
 	sky2->advertising = sky2_supported_modes(hw);
 	sky2->rx_csum = (hw->chip_id != CHIP_ID_YUKON_XL);
-	sky2->wol = sky2_wol_supported(hw) & WAKE_MAGIC;
+	sky2->wol = wol;
 
 	spin_lock_init(&sky2->phy_lock);
 	sky2->tx_pending = TX_DEF_PENDING;
@@ -4086,12 +4086,24 @@ static int __devinit sky2_test_msi(struct sky2_hw *hw)
 	return err;
 }
 
+static int __devinit pci_wake_enabled(struct pci_dev *dev)
+{
+	int pm  = pci_find_capability(dev, PCI_CAP_ID_PM);
+	u16 value;
+
+	if (!pm)
+		return 0;
+	if (pci_read_config_word(dev, pm + PCI_PM_CTRL, &value))
+		return 0;
+	return value & PCI_PM_CTRL_PME_ENABLE;
+}
+
 static int __devinit sky2_probe(struct pci_dev *pdev,
 				const struct pci_device_id *ent)
 {
 	struct net_device *dev;
 	struct sky2_hw *hw;
-	int err, using_dac = 0;
+	int err, using_dac = 0, wol_default;
 
 	err = pci_enable_device(pdev);
 	if (err) {
@@ -4124,6 +4136,8 @@ static int __devinit sky2_probe(struct pci_dev *pdev,
 		}
 	}
 
+	wol_default = pci_wake_enabled(pdev) ? WAKE_MAGIC : 0;
+
 	err = -ENOMEM;
 	hw = kzalloc(sizeof(*hw), GFP_KERNEL);
 	if (!hw) {
@@ -4167,7 +4181,7 @@ static int __devinit sky2_probe(struct pci_dev *pdev,
 
 	sky2_reset(hw);
 
-	dev = sky2_init_netdev(hw, 0, using_dac);
+	dev = sky2_init_netdev(hw, 0, using_dac, wol_default);
 	if (!dev) {
 		err = -ENOMEM;
 		goto err_out_free_pci;
@@ -4204,7 +4218,7 @@ static int __devinit sky2_probe(struct pci_dev *pdev,
 	if (hw->ports > 1) {
 		struct net_device *dev1;
 
-		dev1 = sky2_init_netdev(hw, 1, using_dac);
+		dev1 = sky2_init_netdev(hw, 1, using_dac, wol_default);
 		if (!dev1)
 			dev_warn(&pdev->dev, "allocation for second device failed\n");
 		else if ((err = register_netdev(dev1))) {