X-Git-Url: http://git.rohieb.name/openwrt.git/blobdiff_plain/9f1a8f089c058e8280a09e3837a5fd0168f41de1..e1a6f94b649b044702dfeb7b98ebf6b009e663ae:/target/linux/ramips/files/drivers/net/ramips.c

diff --git a/target/linux/ramips/files/drivers/net/ramips.c b/target/linux/ramips/files/drivers/net/ramips.c
index 30840965a..0565692e5 100644
--- a/target/linux/ramips/files/drivers/net/ramips.c
+++ b/target/linux/ramips/files/drivers/net/ramips.c
@@ -25,6 +25,7 @@
 #include <linux/platform_device.h>
 
 #include <eth.h>
+#include <ramips_eth_platform.h>
 
 #define TX_TIMEOUT (20 * HZ / 100)
 #define	MAX_RX_LENGTH	1500
@@ -54,18 +55,28 @@ static void
 ramips_cleanup_dma(struct net_device *dev)
 {
 	struct raeth_priv *priv = netdev_priv(dev);
+	int i;
+
+	for (i = 0; i < NUM_RX_DESC; i++)
+		if (priv->rx_skb[i])
+			dev_kfree_skb_any(priv->rx_skb[i]);
 
-	dma_free_coherent(NULL, NUM_RX_DESC * sizeof(struct ramips_rx_dma),
-		priv->rx, priv->phy_rx);
+	if (priv->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),
-		priv->tx, priv->phy_tx);
+	if (priv->tx)
+		dma_free_coherent(NULL,
+				  NUM_TX_DESC * sizeof(struct ramips_tx_dma),
+				  priv->tx, priv->phy_tx);
 }
 
 static int
 ramips_alloc_dma(struct net_device *dev)
 {
 	struct raeth_priv *priv = netdev_priv(dev);
+	int err = -ENOMEM;
 	int i;
 
 	priv->skb_free_idx = 0;
@@ -73,6 +84,9 @@ ramips_alloc_dma(struct net_device *dev)
 	/* setup tx ring */
 	priv->tx = dma_alloc_coherent(NULL,
 		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++)
 	{
 		memset(&priv->tx[i], 0, sizeof(struct ramips_tx_dma));
@@ -84,11 +98,17 @@ ramips_alloc_dma(struct net_device *dev)
 	/* setup rx ring */
 	priv->rx = dma_alloc_coherent(NULL,
 		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);
 	for(i = 0; i < NUM_RX_DESC; i++)
 	{
 		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);
 		priv->rx[i].rxd1 =
 			dma_map_single(NULL, skb_put(new_skb, 2), MAX_RX_LENGTH + 2,
@@ -98,6 +118,10 @@ ramips_alloc_dma(struct net_device *dev)
 	}
 
 	return 0;
+
+ err_cleanup:
+	ramips_cleanup_dma(dev);
+	return err;
 }
 
 static void
@@ -277,8 +301,17 @@ static int
 ramips_eth_open(struct net_device *dev)
 {
 	struct raeth_priv *priv = netdev_priv(dev);
+	int err;
+
+	err = request_irq(dev->irq, ramips_eth_irq, IRQF_DISABLED,
+			  dev->name, dev);
+	if (err)
+		return err;
+
+	err = ramips_alloc_dma(dev);
+	if (err)
+		goto err_free_irq;
 
-	ramips_alloc_dma(dev);
 	ramips_setup_dma(dev);
 	ramips_fe_wr((ramips_fe_rr(RAMIPS_PDMA_GLO_CFG) & 0xff) |
 		(RAMIPS_TX_WB_DDONE | RAMIPS_RX_DMA_EN |
@@ -288,7 +321,6 @@ ramips_eth_open(struct net_device *dev)
 		~(RAMIPS_US_CYC_CNT_MASK << RAMIPS_US_CYC_CNT_SHIFT)) |
 		((rt305x_sys_freq / RAMIPS_US_CYC_CNT_DIVISOR) << RAMIPS_US_CYC_CNT_SHIFT),
 		RAMIPS_FE_GLO_CFG);
-	request_irq(dev->irq, ramips_eth_irq, IRQF_DISABLED, dev->name, dev);
 	tasklet_init(&priv->tx_housekeeping_tasklet, ramips_eth_tx_housekeeping,
 		(unsigned long)dev);
 	tasklet_init(&priv->rx_tasklet, ramips_eth_rx_hw, (unsigned long)dev);
@@ -305,6 +337,10 @@ ramips_eth_open(struct net_device *dev)
 	ramips_fe_wr(0, RAMIPS_FE_RST_GL);
 	netif_start_queue(dev);
 	return 0;
+
+ err_free_irq:
+	free_irq(dev->irq, dev);
+	return err;
 }
 
 static int