1 files changed, 19 insertions, 1 deletions

diff --git a/drivers/net/macb.c b/drivers/net/macb.c
index e82aee41d77e..5b5c25368d1e 100644
--- a/drivers/net/macb.c
+++ b/drivers/net/macb.c
@@ -599,6 +599,21 @@ static irqreturn_t macb_interrupt(int irq, void *dev_id)
         return IRQ_HANDLED;
 }
 
+#ifdef CONFIG_NET_POLL_CONTROLLER
+/*
+ * Polling receive - used by netconsole and other diagnostic tools
+ * to allow network i/o with interrupts disabled.
+ */
+static void macb_poll_controller(struct net_device *dev)
+{
+        unsigned long flags;
+
+        local_irq_save(flags);
+        macb_interrupt(dev->irq, dev);
+        local_irq_restore(flags);
+}
+#endif
+
 static int macb_start_xmit(struct sk_buff *skb, struct net_device *dev)
 {
         struct macb *bp = netdev_priv(dev);
@@ -630,7 +645,7 @@ static int macb_start_xmit(struct sk_buff *skb, struct net_device *dev)
                         "BUG! Tx Ring full when queue awake!\n");
                 dev_dbg(&bp->pdev->dev, "tx_head = %u, tx_tail = %u\n",
                         bp->tx_head, bp->tx_tail);
-                return 1;
+                return NETDEV_TX_BUSY;
         }
 
         entry = bp->tx_head;
@@ -1094,6 +1109,9 @@ static const struct net_device_ops macb_netdev_ops = {
         .ndo_validate_addr      = eth_validate_addr,
         .ndo_change_mtu         = eth_change_mtu,
         .ndo_set_mac_address    = eth_mac_addr,
+#ifdef CONFIG_NET_POLL_CONTROLLER
+        .ndo_poll_controller    = macb_poll_controller,
+#endif
 };
 
 static int __init macb_probe(struct platform_device *pdev)