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cns3xxx: prevent the ethernet driver from accessing uninitialized dma descriptor entries

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git-svn-id: svn://svn.openwrt.org/openwrt/trunk@35950 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
Felix Fietkau
2013-03-10 21:59:28 +00:00
parent b019b3bb2f
commit 1bb86e38d7
1 changed files with 2 additions and 1 deletions
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3
target/linux/cns3xxx/files/drivers/net/ethernet/cavium/cns3xxx_eth.c
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@@ -619,8 +619,9 @@ static int eth_poll(struct napi_struct *napi, int budget)
unsigned int length;
unsigned int i = rx_ring->cur_index;
struct rx_desc *desc = &(rx_ring)->desc[i];
unsigned int alloc_count = rx_ring->alloc_count;
while (desc->cown) {
while (desc->cown && alloc_count + received < RX_DESCS - 1) {
struct sk_buff *skb;
int reserve = SKB_HEAD_ALIGN;