diff -r af21f0bdc7c9 -r 2b9c78543663 devices/e1000/e1000_main-2.6.26-ethercat.c
--- a/devices/e1000/e1000_main-2.6.26-ethercat.c	Thu Sep 06 14:21:02 2012 +0200
+++ b/devices/e1000/e1000_main-2.6.26-ethercat.c	Mon Nov 03 15:20:05 2014 +0100
@@ -672,7 +672,7 @@
 	netdev->tx_queue_len = adapter->tx_queue_len;
 	adapter->link_speed = 0;
 	adapter->link_duplex = 0;
-	
+
 	if (!adapter->ecdev) {
 		netif_carrier_off(netdev);
 		netif_stop_queue(netdev);
@@ -1243,7 +1243,8 @@
 	// offer device to EtherCAT master module
 	adapter->ecdev = ecdev_offer(netdev, ec_poll, THIS_MODULE);
 	if (adapter->ecdev) {
-		if (ecdev_open(adapter->ecdev)) {
+		err = ecdev_open(adapter->ecdev);
+		if (err) {
 			ecdev_withdraw(adapter->ecdev);
 			goto err_register;
 		}
@@ -1544,7 +1545,9 @@
 	clear_bit(__E1000_DOWN, &adapter->flags);
 
 #ifdef CONFIG_E1000_NAPI
-	napi_enable(&adapter->napi);
+	if (!adapter->ecdev) {
+		napi_enable(&adapter->napi);
+	}
 #endif
 
 	e1000_irq_enable(adapter);
@@ -2467,7 +2470,7 @@
 		/* No need to loop, because 82542 supports only 1 queue */
 		struct e1000_rx_ring *ring = &adapter->rx_ring[0];
 		e1000_configure_rx(adapter);
-		if (adapter->ecdev) { 
+		if (adapter->ecdev) {
 			/* fill rx ring completely! */
 			adapter->alloc_rx_buf(adapter, ring, ring->count);
 		} else {
@@ -3370,6 +3373,10 @@
 	struct e1000_adapter *adapter = netdev_priv(netdev);
 	struct e1000_tx_ring *tx_ring = adapter->tx_ring;
 
+	if (adapter->ecdev) {
+		return -EBUSY;
+	}
+
 	netif_stop_queue(netdev);
 	/* Herbert's original patch had:
 	 *  smp_mb__after_netif_stop_queue();
@@ -3924,7 +3931,7 @@
 	struct net_device *netdev = data;
 	struct e1000_adapter *adapter = netdev_priv(netdev);
 	struct e1000_hw *hw = &adapter->hw;
-	
+
 	int i;
 
 	if (adapter->ecdev) {
@@ -4103,7 +4110,7 @@
 
 #endif
 	}
-	
+
 	return IRQ_HANDLED;
 }