From: Hauke Mehrtens <hauke@hauke-m.de>
bgmac: add support for Byte Queue Limits

--- a/drivers/net/ethernet/broadcom/bgmac.c
+++ b/drivers/net/ethernet/broadcom/bgmac.c
@@ -183,6 +183,7 @@ static void bgmac_dma_tx_free(struct bgm
 	struct device *dma_dev = bgmac->core->dma_dev;
 	int empty_slot;
 	bool freed = false;
+	unsigned bytes_compl = 0, pkts_compl = 0;
 
 	/* The last slot that hardware didn't consume yet */
 	empty_slot = bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_TX_STATUS);
@@ -200,6 +201,9 @@ static void bgmac_dma_tx_free(struct bgm
 					 slot->skb->len, DMA_TO_DEVICE);
 			slot->dma_addr = 0;
 
+			bytes_compl += slot->skb->len;
+			pkts_compl++;
+
 			/* Free memory! :) */
 			dev_kfree_skb(slot->skb);
 			slot->skb = NULL;
@@ -213,6 +217,8 @@ static void bgmac_dma_tx_free(struct bgm
 		freed = true;
 	}
 
+	netdev_completed_queue(bgmac->net_dev, pkts_compl, bytes_compl);
+
 	if (freed && netif_queue_stopped(bgmac->net_dev))
 		netif_wake_queue(bgmac->net_dev);
 }
@@ -1013,6 +1019,8 @@ static void bgmac_chip_reset(struct bgma
 		bgmac_set(bgmac, BGMAC_PHY_CNTL, BGMAC_PC_MTE);
 	bgmac_miiconfig(bgmac);
 	bgmac_phy_init(bgmac);
+	
+	netdev_reset_queue(bgmac->net_dev);
 
 	bgmac->int_status = 0;
 }
@@ -1227,6 +1235,8 @@ static netdev_tx_t bgmac_start_xmit(stru
 	struct bgmac *bgmac = netdev_priv(net_dev);
 	struct bgmac_dma_ring *ring;
 
+	netdev_sent_queue(net_dev, skb->len);
+
 	/* No QOS support yet */
 	ring = &bgmac->tx_ring[0];
 	return bgmac_dma_tx_add(bgmac, ring, skb);