---

yaml
---
r: 75180
b: refs/heads/master
c: bdcba15
h: refs/heads/master
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 61c93f4eb45493f203d6bad24156599668be614f
+refs/heads/master: bdcba1511b98f2e728b3a910b8771a0d3fce5bf3

trunk/drivers/net/macb.c

@@ -307,8 +307,31 @@ static void macb_tx(struct macb *bp)
 		(unsigned long)status);
 
 	if (status & MACB_BIT(UND)) {
+		int i;
 		printk(KERN_ERR "%s: TX underrun, resetting buffers\n",
-		       bp->dev->name);
+			bp->dev->name);
+
+		head = bp->tx_head;
+
+		/*Mark all the buffer as used to avoid sending a lost buffer*/
+		for (i = 0; i < TX_RING_SIZE; i++)
+			bp->tx_ring[i].ctrl = MACB_BIT(TX_USED);
+
+		/* free transmit buffer in upper layer*/
+		for (tail = bp->tx_tail; tail != head; tail = NEXT_TX(tail)) {
+			struct ring_info *rp = &bp->tx_skb[tail];
+			struct sk_buff *skb = rp->skb;
+
+			BUG_ON(skb == NULL);
+
+			rmb();
+
+			dma_unmap_single(&bp->pdev->dev, rp->mapping, skb->len,
+							 DMA_TO_DEVICE);
+			rp->skb = NULL;
+			dev_kfree_skb_irq(skb);
+		}
+
 		bp->tx_head = bp->tx_tail = 0;
 	}