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Subject[PATCH net-next 08/23] {topost} net: hns3: fix rx path skb->truesize reporting bug
Date
Original skb->truesize reports the received packet size,
not the actual buffer size NIC driver allocated(1 Page).
The linux net protocol will misjudge the true size of rx queue.

Signed-off-by: Peng Li <lipeng321@huawei.com>
---
drivers/net/ethernet/hisilicon/hns3/hns3_enet.c | 10 ++++------
1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
index 83f4b36..f50245d 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
@@ -2064,15 +2064,13 @@ static void hns3_nic_reuse_page(struct sk_buff *skb, int i,
desc = &ring->desc[ring->next_to_clean];
size = le16_to_cpu(desc->rx.size);

- if (twobufs) {
- truesize = hnae_buf_size(ring);
- } else {
- truesize = ALIGN(size, L1_CACHE_BYTES);
+ truesize = hnae_buf_size(ring);
+
+ if (!twobufs)
last_offset = hnae_page_size(ring) - hnae_buf_size(ring);
- }

skb_add_rx_frag(skb, i, desc_cb->priv, desc_cb->page_offset + pull_len,
- size - pull_len, truesize - pull_len);
+ size - pull_len, truesize);

/* Avoid re-using remote pages,flag default unreuse */
if (unlikely(page_to_nid(desc_cb->priv) != numa_node_id()))
--
2.9.3
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