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net: hns3: fix desc filling bug when skb is expanded or lineared

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The linear and frag data part may be changed when the skb is expanded
or lineared in skb_cow_head() or skb_checksum_help(), which is called
by hns3_fill_skb_desc(), so the linear len return by skb_headlen()
before the calling of hns3_fill_skb_desc() is unreliable.

Move hns3_fill_skb_desc() before the calling of skb_headlen() to fix
this bug.

Fixes: 76ad4f0ee7 ("net: hns3: Add support of HNS3 Ethernet Driver for hip08 SoC")
Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Yunsheng Lin 2020-07-28 10:16:48 +08:00 committed by David S. Miller
parent 181964e619
commit cfdaeba5dd
1 changed files with 6 additions and 10 deletions
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16
drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
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@ -1093,16 +1093,8 @@ static int hns3_fill_desc(struct hns3_enet_ring *ring, void *priv,
int k, sizeoflast;
dma_addr_t dma;
if (type == DESC_TYPE_SKB) {
struct sk_buff *skb = (struct sk_buff *)priv;
int ret;
ret = hns3_fill_skb_desc(ring, skb, desc);
if (unlikely(ret < 0))
return ret;
dma = dma_map_single(dev, skb->data, size, DMA_TO_DEVICE);
} else if (type == DESC_TYPE_FRAGLIST_SKB) {
if (type == DESC_TYPE_FRAGLIST_SKB ||
type == DESC_TYPE_SKB) {
struct sk_buff *skb = (struct sk_buff *)priv;
dma = dma_map_single(dev, skb->data, size, DMA_TO_DEVICE);
@ -1439,6 +1431,10 @@ netdev_tx_t hns3_nic_net_xmit(struct sk_buff *skb, struct net_device *netdev)
next_to_use_head = ring->next_to_use;
ret = hns3_fill_skb_desc(ring, skb, &ring->desc[ring->next_to_use]);
if (unlikely(ret < 0))
goto fill_err;
ret = hns3_fill_skb_to_desc(ring, skb, DESC_TYPE_SKB);
if (unlikely(ret < 0))
goto fill_err;