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path: root/drivers/net/ll_temac_main.c
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Diffstat (limited to 'drivers/net/ll_temac_main.c')
-rw-r--r--drivers/net/ll_temac_main.c63
1 files changed, 60 insertions, 3 deletions
diff --git a/drivers/net/ll_temac_main.c b/drivers/net/ll_temac_main.c
index 6474c4973d3..b5c6279cc5a 100644
--- a/drivers/net/ll_temac_main.c
+++ b/drivers/net/ll_temac_main.c
@@ -193,6 +193,35 @@ static int temac_dcr_setup(struct temac_local *lp, struct of_device *op,
#endif
/**
+ * * temac_dma_bd_release - Release buffer descriptor rings
+ */
+static void temac_dma_bd_release(struct net_device *ndev)
+{
+ struct temac_local *lp = netdev_priv(ndev);
+ int i;
+
+ for (i = 0; i < RX_BD_NUM; i++) {
+ if (!lp->rx_skb[i])
+ break;
+ else {
+ dma_unmap_single(ndev->dev.parent, lp->rx_bd_v[i].phys,
+ XTE_MAX_JUMBO_FRAME_SIZE, DMA_FROM_DEVICE);
+ dev_kfree_skb(lp->rx_skb[i]);
+ }
+ }
+ if (lp->rx_bd_v)
+ dma_free_coherent(ndev->dev.parent,
+ sizeof(*lp->rx_bd_v) * RX_BD_NUM,
+ lp->rx_bd_v, lp->rx_bd_p);
+ if (lp->tx_bd_v)
+ dma_free_coherent(ndev->dev.parent,
+ sizeof(*lp->tx_bd_v) * TX_BD_NUM,
+ lp->tx_bd_v, lp->tx_bd_p);
+ if (lp->rx_skb)
+ kfree(lp->rx_skb);
+}
+
+/**
* temac_dma_bd_init - Setup buffer descriptor rings
*/
static int temac_dma_bd_init(struct net_device *ndev)
@@ -202,14 +231,29 @@ static int temac_dma_bd_init(struct net_device *ndev)
int i;
lp->rx_skb = kzalloc(sizeof(*lp->rx_skb) * RX_BD_NUM, GFP_KERNEL);
+ if (!lp->rx_skb) {
+ dev_err(&ndev->dev,
+ "can't allocate memory for DMA RX buffer\n");
+ goto out;
+ }
/* allocate the tx and rx ring buffer descriptors. */
/* returns a virtual addres and a physical address. */
lp->tx_bd_v = dma_alloc_coherent(ndev->dev.parent,
sizeof(*lp->tx_bd_v) * TX_BD_NUM,
&lp->tx_bd_p, GFP_KERNEL);
+ if (!lp->tx_bd_v) {
+ dev_err(&ndev->dev,
+ "unable to allocate DMA TX buffer descriptors");
+ goto out;
+ }
lp->rx_bd_v = dma_alloc_coherent(ndev->dev.parent,
sizeof(*lp->rx_bd_v) * RX_BD_NUM,
&lp->rx_bd_p, GFP_KERNEL);
+ if (!lp->rx_bd_v) {
+ dev_err(&ndev->dev,
+ "unable to allocate DMA RX buffer descriptors");
+ goto out;
+ }
memset(lp->tx_bd_v, 0, sizeof(*lp->tx_bd_v) * TX_BD_NUM);
for (i = 0; i < TX_BD_NUM; i++) {
@@ -227,7 +271,7 @@ static int temac_dma_bd_init(struct net_device *ndev)
if (skb == 0) {
dev_err(&ndev->dev, "alloc_skb error %d\n", i);
- return -1;
+ goto out;
}
lp->rx_skb[i] = skb;
/* returns physical address of skb->data */
@@ -258,6 +302,10 @@ static int temac_dma_bd_init(struct net_device *ndev)
lp->dma_out(lp, TX_CURDESC_PTR, lp->tx_bd_p);
return 0;
+
+out:
+ temac_dma_bd_release(ndev);
+ return -ENOMEM;
}
/* ---------------------------------------------------------------------
@@ -505,7 +553,10 @@ static void temac_device_reset(struct net_device *ndev)
}
lp->dma_out(lp, DMA_CONTROL_REG, DMA_TAIL_ENABLE);
- temac_dma_bd_init(ndev);
+ if (temac_dma_bd_init(ndev)) {
+ dev_err(&ndev->dev,
+ "temac_device_reset descriptor allocation failed\n");
+ }
temac_indirect_out32(lp, XTE_RXC0_OFFSET, 0);
temac_indirect_out32(lp, XTE_RXC1_OFFSET, 0);
@@ -837,6 +888,8 @@ static int temac_stop(struct net_device *ndev)
phy_disconnect(lp->phy_dev);
lp->phy_dev = NULL;
+ temac_dma_bd_release(ndev);
+
return 0;
}
@@ -862,6 +915,7 @@ static const struct net_device_ops temac_netdev_ops = {
.ndo_stop = temac_stop,
.ndo_start_xmit = temac_start_xmit,
.ndo_set_mac_address = netdev_set_mac_address,
+ .ndo_validate_addr = eth_validate_addr,
//.ndo_set_multicast_list = temac_set_multicast_list,
#ifdef CONFIG_NET_POLL_CONTROLLER
.ndo_poll_controller = temac_poll_controller,
@@ -978,19 +1032,22 @@ temac_of_probe(struct of_device *op, const struct of_device_id *match)
dev_dbg(&op->dev, "MEM base: %p\n", lp->sdma_regs);
} else {
dev_err(&op->dev, "unable to map DMA registers\n");
+ of_node_put(np);
goto err_iounmap;
}
}
lp->rx_irq = irq_of_parse_and_map(np, 0);
lp->tx_irq = irq_of_parse_and_map(np, 1);
+
+ of_node_put(np); /* Finished with the DMA node; drop the reference */
+
if ((lp->rx_irq == NO_IRQ) || (lp->tx_irq == NO_IRQ)) {
dev_err(&op->dev, "could not determine irqs\n");
rc = -ENOMEM;
goto err_iounmap_2;
}
- of_node_put(np); /* Finished with the DMA node; drop the reference */
/* Retrieve the MAC address */
addr = of_get_property(op->dev.of_node, "local-mac-address", &size);