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ramips: add error handling to ramips_alloc_dma

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git-svn-id: svn://svn.openwrt.org/openwrt/trunk@18172 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
juhosg 2009-10-26 17:17:39 +00:00
parent 8fee1ed8aa
commit fae14fc50e
1 changed files with 28 additions and 6 deletions
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34
target/linux/ramips/files/drivers/net/ramips.c
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@ -60,17 +60,22 @@ ramips_cleanup_dma(struct net_device *dev)
if (priv->rx_skb[i]) if (priv->rx_skb[i])
dev_kfree_skb_any(priv->rx_skb[i]); dev_kfree_skb_any(priv->rx_skb[i]);
dma_free_coherent(NULL, NUM_RX_DESC * sizeof(struct ramips_rx_dma), if (priv->rx)
priv->rx, priv->phy_rx); dma_free_coherent(NULL,
NUM_RX_DESC * sizeof(struct ramips_rx_dma),
priv->rx, priv->phy_rx);
dma_free_coherent(NULL, NUM_TX_DESC * sizeof(struct ramips_tx_dma), if (priv->tx)
priv->tx, priv->phy_tx); dma_free_coherent(NULL,
NUM_TX_DESC * sizeof(struct ramips_tx_dma),
priv->tx, priv->phy_tx);
} }
static int static int
ramips_alloc_dma(struct net_device *dev) ramips_alloc_dma(struct net_device *dev)
{ {
struct raeth_priv *priv = netdev_priv(dev); struct raeth_priv *priv = netdev_priv(dev);
int err = -ENOMEM;
int i; int i;
priv->skb_free_idx = 0; priv->skb_free_idx = 0;
@ -78,6 +83,9 @@ ramips_alloc_dma(struct net_device *dev)
/* setup tx ring */ /* setup tx ring */
priv->tx = dma_alloc_coherent(NULL, priv->tx = dma_alloc_coherent(NULL,
NUM_TX_DESC * sizeof(struct ramips_tx_dma), &priv->phy_tx, GFP_ATOMIC); NUM_TX_DESC * sizeof(struct ramips_tx_dma), &priv->phy_tx, GFP_ATOMIC);
if (!priv->tx)
goto err_cleanup;
for(i = 0; i < NUM_TX_DESC; i++) for(i = 0; i < NUM_TX_DESC; i++)
{ {
memset(&priv->tx[i], 0, sizeof(struct ramips_tx_dma)); memset(&priv->tx[i], 0, sizeof(struct ramips_tx_dma));
@ -89,11 +97,17 @@ ramips_alloc_dma(struct net_device *dev)
/* setup rx ring */ /* setup rx ring */
priv->rx = dma_alloc_coherent(NULL, priv->rx = dma_alloc_coherent(NULL,
NUM_RX_DESC * sizeof(struct ramips_rx_dma), &priv->phy_rx, GFP_ATOMIC); NUM_RX_DESC * sizeof(struct ramips_rx_dma), &priv->phy_rx, GFP_ATOMIC);
if (!priv->rx)
goto err_cleanup;
memset(priv->rx, 0, sizeof(struct ramips_rx_dma) * NUM_RX_DESC); memset(priv->rx, 0, sizeof(struct ramips_rx_dma) * NUM_RX_DESC);
for(i = 0; i < NUM_RX_DESC; i++) for(i = 0; i < NUM_RX_DESC; i++)
{ {
struct sk_buff *new_skb = dev_alloc_skb(MAX_RX_LENGTH + 2); struct sk_buff *new_skb = dev_alloc_skb(MAX_RX_LENGTH + 2);
BUG_ON(!new_skb);
if (!new_skb)
goto err_cleanup;
skb_reserve(new_skb, 2); skb_reserve(new_skb, 2);
priv->rx[i].rxd1 = priv->rx[i].rxd1 =
dma_map_single(NULL, skb_put(new_skb, 2), MAX_RX_LENGTH + 2, dma_map_single(NULL, skb_put(new_skb, 2), MAX_RX_LENGTH + 2,
@ -103,6 +117,10 @@ ramips_alloc_dma(struct net_device *dev)
} }
return 0; return 0;
err_cleanup:
ramips_cleanup_dma(dev);
return err;
} }
static void static void
@ -282,8 +300,12 @@ static int
ramips_eth_open(struct net_device *dev) ramips_eth_open(struct net_device *dev)
{ {
struct raeth_priv *priv = netdev_priv(dev); struct raeth_priv *priv = netdev_priv(dev);
int err;
err = ramips_alloc_dma(dev);
if (err)
return err;
ramips_alloc_dma(dev);
ramips_setup_dma(dev); ramips_setup_dma(dev);
ramips_fe_wr((ramips_fe_rr(RAMIPS_PDMA_GLO_CFG) & 0xff) | ramips_fe_wr((ramips_fe_rr(RAMIPS_PDMA_GLO_CFG) & 0xff) |
(RAMIPS_TX_WB_DDONE | RAMIPS_RX_DMA_EN | (RAMIPS_TX_WB_DDONE | RAMIPS_RX_DMA_EN |