Merge branch 'bcmgenet-cleanups'

Petri Gynther says:

====================
bcmgenet cleanups

Three cleanup patches for bcmgenet.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/broadcom/genet/bcmgenet.c

@@ -104,8 +104,8 @@ static inline void dmadesc_set_addr(struct bcmgenet_priv *priv,
 static inline void dmadesc_set(struct bcmgenet_priv *priv,
 			       void __iomem *d, dma_addr_t addr, u32 val)
 {
-	dmadesc_set_length_status(priv, d, val);
 	dmadesc_set_addr(priv, d, addr);
+	dmadesc_set_length_status(priv, d, val);
 }
 
 static inline dma_addr_t dmadesc_get_addr(struct bcmgenet_priv *priv,
@@ -1331,17 +1331,20 @@ static int bcmgenet_xmit_frag(struct net_device *dev,
 	struct bcmgenet_priv *priv = netdev_priv(dev);
 	struct device *kdev = &priv->pdev->dev;
 	struct enet_cb *tx_cb_ptr;
+	unsigned int frag_size;
 	dma_addr_t mapping;
 	int ret;
 
 	tx_cb_ptr = bcmgenet_get_txcb(priv, ring);
 
 	if (unlikely(!tx_cb_ptr))
 		BUG();
+
 	tx_cb_ptr->skb = NULL;
 
-	mapping = skb_frag_dma_map(kdev, frag, 0,
-				   skb_frag_size(frag), DMA_TO_DEVICE);
+	frag_size = skb_frag_size(frag);
+
+	mapping = skb_frag_dma_map(kdev, frag, 0, frag_size, DMA_TO_DEVICE);
 	ret = dma_mapping_error(kdev, mapping);
 	if (ret) {
 		priv->mib.tx_dma_failed++;
@@ -1351,10 +1354,10 @@ static int bcmgenet_xmit_frag(struct net_device *dev,
 	}
 
 	dma_unmap_addr_set(tx_cb_ptr, dma_addr, mapping);
-	dma_unmap_len_set(tx_cb_ptr, dma_len, frag->size);
+	dma_unmap_len_set(tx_cb_ptr, dma_len, frag_size);
 
 	dmadesc_set(priv, tx_cb_ptr->bd_addr, mapping,
-		    (frag->size << DMA_BUFLENGTH_SHIFT) | dma_desc_flags |
+		    (frag_size << DMA_BUFLENGTH_SHIFT) | dma_desc_flags |
 		    (priv->hw_params->qtag_mask << DMA_TX_QTAG_SHIFT));
 
 	return 0;
@@ -1447,15 +1450,19 @@ static netdev_tx_t bcmgenet_xmit(struct sk_buff *skb, struct net_device *dev)
 	else
 		index -= 1;
 
-	nr_frags = skb_shinfo(skb)->nr_frags;
 	ring = &priv->tx_rings[index];
 	txq = netdev_get_tx_queue(dev, ring->queue);
 
+	nr_frags = skb_shinfo(skb)->nr_frags;
+
 	spin_lock_irqsave(&ring->lock, flags);
-	if (ring->free_bds <= nr_frags + 1) {
-		netif_tx_stop_queue(txq);
-		netdev_err(dev, "%s: tx ring %d full when queue %d awake\n",
-			   __func__, index, ring->queue);
+	if (ring->free_bds <= (nr_frags + 1)) {
+		if (!netif_tx_queue_stopped(txq)) {
+			netif_tx_stop_queue(txq);
+			netdev_err(dev,
+				   "%s: tx ring %d full when queue %d awake\n",
+				   __func__, index, ring->queue);
+		}
 		ret = NETDEV_TX_BUSY;
 		goto out;
 	}