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

Sieng Piaw Liew
2021-01-06T14:44:24Z

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.piaw@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