X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=drivers%2Fnet%2Fmacb.c;h=e10528ed90814b626751d5488e5bb26233bed360;hb=247ae4492065ed73bf5f287e38cd4c54ce192b27;hp=047ea7be4850cfccfb812436c03a410e01661098;hpb=37e58df30063e229ee5157f9d1c1fa1d749917c2;p=linux-2.6-omap-h63xx.git

diff --git a/drivers/net/macb.c b/drivers/net/macb.c
index 047ea7be485..e10528ed908 100644
--- a/drivers/net/macb.c
+++ b/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;
 	}