sky2: Fix suspend/hibernation/shutdown regression with WOL enabled (r…

…ev. 2)

On my test box with the Asus M3A32-MVP main board there is a
regression from 2.6.26 related to suspend, hibernation and
shutdown.  Namely, if Wake-on-LAN is enabled with
'ethtool -s eth0 wol g', the box hangs solid during all of these
operations, while executing either sky2_suspend(), or
sky2_shutdown().  This patch fixes it for me.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

drivers/net/sky2.c

@@ -665,11 +665,16 @@ static void sky2_phy_power_down(struct sky2_hw *hw, unsigned port)
 
 	if (hw->chip_id != CHIP_ID_YUKON_EC) {
 		if (hw->chip_id == CHIP_ID_YUKON_EC_U) {
-			ctrl = gm_phy_read(hw, port, PHY_MARV_PHY_CTRL);
+			/* select page 2 to access MAC control register */
+			gm_phy_write(hw, port, PHY_MARV_EXT_ADR, 2);
 
+			ctrl = gm_phy_read(hw, port, PHY_MARV_PHY_CTRL);
 			/* enable Power Down */
 			ctrl |= PHY_M_PC_POW_D_ENA;
 			gm_phy_write(hw, port, PHY_MARV_PHY_CTRL, ctrl);
+
+			/* set page register back to 0 */
+			gm_phy_write(hw, port, PHY_MARV_EXT_ADR, 0);
 		}
 
 		/* set IEEE compatible Power Down Mode (dev. #4.99) */