[PATCH net-next v3 5/7] bcm63xx_enet: consolidate rx SKB ring cleanup code

[Sieng Piaw Liew]

The rx SKB ring use the same code for cleanup at various points.
Combine them into a function to reduce lines of code.

Signed-off-by: Sieng Piaw Liew <liew.s.p...@gmail.com>
---
 drivers/net/ethernet/broadcom/bcm63xx_enet.c | 72 ++++++--------------
 1 file changed, 22 insertions(+), 50 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bcm63xx_enet.c 
b/drivers/net/ethernet/broadcom/bcm63xx_enet.c
index 96d56c3e2cc9..e34b05b10e43 100644
--- a/drivers/net/ethernet/broadcom/bcm63xx_enet.c
+++ b/drivers/net/ethernet/broadcom/bcm63xx_enet.c
@@ -860,6 +860,24 @@ static void bcm_enet_adjust_link(struct net_device *dev)
                priv->pause_tx ? "tx" : "off");
 }
 
+static void bcm_enet_free_rx_skb_ring(struct device *kdev, struct 
bcm_enet_priv *priv)
+{
+       int i;
+
+       for (i = 0; i < priv->rx_ring_size; i++) {
+               struct bcm_enet_desc *desc;
+
+               if (!priv->rx_skb[i])
+                       continue;
+
+               desc = &priv->rx_desc_cpu[i];
+               dma_unmap_single(kdev, desc->address, priv->rx_skb_size,
+                                DMA_FROM_DEVICE);
+               kfree_skb(priv->rx_skb[i]);
+       }
+       kfree(priv->rx_skb);
+}
+
 /*
  * open callback, allocate dma rings & buffers and start rx operation
  */
@@ -1084,18 +1102,7 @@ static int bcm_enet_open(struct net_device *dev)
        return 0;
 
 out:
-       for (i = 0; i < priv->rx_ring_size; i++) {
-               struct bcm_enet_desc *desc;
-
-               if (!priv->rx_skb[i])
-                       continue;
-
-               desc = &priv->rx_desc_cpu[i];
-               dma_unmap_single(kdev, desc->address, priv->rx_skb_size,
-                                DMA_FROM_DEVICE);
-               kfree_skb(priv->rx_skb[i]);
-       }
-       kfree(priv->rx_skb);
+       bcm_enet_free_rx_skb_ring(kdev, priv);
 
 out_free_tx_skb:
        kfree(priv->tx_skb);
@@ -1174,7 +1181,6 @@ static int bcm_enet_stop(struct net_device *dev)
 {
        struct bcm_enet_priv *priv;
        struct device *kdev;
-       int i;
 
        priv = netdev_priv(dev);
        kdev = &priv->pdev->dev;
@@ -1203,20 +1209,9 @@ static int bcm_enet_stop(struct net_device *dev)
        bcm_enet_tx_reclaim(dev, 1);
 
        /* free the rx skb ring */
-       for (i = 0; i < priv->rx_ring_size; i++) {
-               struct bcm_enet_desc *desc;
-
-               if (!priv->rx_skb[i])
-                       continue;
-
-               desc = &priv->rx_desc_cpu[i];
-               dma_unmap_single(kdev, desc->address, priv->rx_skb_size,
-                                DMA_FROM_DEVICE);
-               kfree_skb(priv->rx_skb[i]);
-       }
+       bcm_enet_free_rx_skb_ring(kdev, priv);
 
        /* free remaining allocated memory */
-       kfree(priv->rx_skb);
        kfree(priv->tx_skb);
        dma_free_coherent(kdev, priv->rx_desc_alloc_size,
                          priv->rx_desc_cpu, priv->rx_desc_dma);
@@ -2303,18 +2298,7 @@ static int bcm_enetsw_open(struct net_device *dev)
        return 0;
 
 out:
-       for (i = 0; i < priv->rx_ring_size; i++) {
-               struct bcm_enet_desc *desc;
-
-               if (!priv->rx_skb[i])
-                       continue;
-
-               desc = &priv->rx_desc_cpu[i];
-               dma_unmap_single(kdev, desc->address, priv->rx_skb_size,
-                                DMA_FROM_DEVICE);
-               kfree_skb(priv->rx_skb[i]);
-       }
-       kfree(priv->rx_skb);
+       bcm_enet_free_rx_skb_ring(kdev, priv);
 
 out_free_tx_skb:
        kfree(priv->tx_skb);
@@ -2343,7 +2327,6 @@ static int bcm_enetsw_stop(struct net_device *dev)
 {
        struct bcm_enet_priv *priv;
        struct device *kdev;
-       int i;
 
        priv = netdev_priv(dev);
        kdev = &priv->pdev->dev;
@@ -2366,20 +2349,9 @@ static int bcm_enetsw_stop(struct net_device *dev)
        bcm_enet_tx_reclaim(dev, 1);
 
        /* free the rx skb ring */
-       for (i = 0; i < priv->rx_ring_size; i++) {
-               struct bcm_enet_desc *desc;
-
-               if (!priv->rx_skb[i])
-                       continue;
-
-               desc = &priv->rx_desc_cpu[i];
-               dma_unmap_single(kdev, desc->address, priv->rx_skb_size,
-                                DMA_FROM_DEVICE);
-               kfree_skb(priv->rx_skb[i]);
-       }
+       bcm_enet_free_rx_skb_ring(kdev, priv);
 
        /* free remaining allocated memory */
-       kfree(priv->rx_skb);
        kfree(priv->tx_skb);
        dma_free_coherent(kdev, priv->rx_desc_alloc_size,
                          priv->rx_desc_cpu, priv->rx_desc_dma);
-- 
2.17.1