tg3: Do not call device_set_wakeup_enable() under spin_lock_bh

The tg3 driver calls device_set_wakeup_enable() under spin_lock_bh,
which causes a problem to happen after the recent core power
management changes, because this function can sleep now.  Fix this
by moving the device_set_wakeup_enable() call out of the
spin_lock_bh-protected area.

Reported-by: Maxim Levitsky <maximlevitsky@gmail.com>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/tg3.c

@@ -9948,16 +9948,16 @@ static int tg3_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
 	    !((tp->tg3_flags & TG3_FLAG_WOL_CAP) && device_can_wakeup(dp)))
 		return -EINVAL;
 
+	device_set_wakeup_enable(dp, wol->wolopts & WAKE_MAGIC);
+
 	spin_lock_bh(&tp->lock);
-	if (wol->wolopts & WAKE_MAGIC) {
+	if (device_may_wakeup(dp))
 		tp->tg3_flags |= TG3_FLAG_WOL_ENABLE;
-		device_set_wakeup_enable(dp, true);
+	else
-	} else {
 		tp->tg3_flags &= ~TG3_FLAG_WOL_ENABLE;
-		device_set_wakeup_enable(dp, false);
-	}
 	spin_unlock_bh(&tp->lock);
 
+
 	return 0;
 }