@@ -741,7 +741,7 @@ static struct ethtool_ops netdev_ethtool_ops = {
.get_link = netdev_get_link,
};
-static void korina_alloc_ring(struct net_device *dev)
+static int korina_alloc_ring(struct net_device *dev)
{
struct korina_private *lp = netdev_priv(dev);
struct sk_buff *skb;
@@ -762,7 +762,7 @@ static void korina_alloc_ring(struct net_device *dev)
for (i = 0; i < KORINA_NUM_RDS; i++) {
skb = dev_alloc_skb(KORINA_RBSIZE + 2);
if (!skb)
- break;
+ return -ENOMEM;
skb_reserve(skb, 2);
skb->dev = dev;
lp->rx_skb[i] = skb;
@@ -782,6 +782,8 @@ static void korina_alloc_ring(struct net_device *dev)
lp->rx_chain_head = 0;
lp->rx_chain_tail = 0;
lp->rx_chain_status = desc_empty;
+
+ return 0;
}
static void korina_free_ring(struct net_device *dev)
@@ -824,7 +826,11 @@ static int korina_init(struct net_device *dev)
writel(ETH_INT_FC_EN, &lp->eth_regs->ethintfc);
/* Allocate rings */
- korina_alloc_ring(dev);
+ if (korina_alloc_ring(dev)) {
+ printk(KERN_ERR "%s: descriptor allocation failed\n", dev->name);
+ korina_free_ring(dev);
+ return -ENOMEM;
+ }
writel(0, &lp->rx_dma_regs->dmas);
/* Start Rx DMA */
This also avoids a potential buffer overflow in case the very first receive descriptor fails to allocate, as an index of -1 would be used afterwards. Kudos to Roel Kluin for pointing this out and providing an initial patch. Signed-off-by: Phil Sutter <n0-1@freewrt.org> --- drivers/net/korina.c | 12 +++++++++--- 1 files changed, 9 insertions(+), 3 deletions(-)