From 885a882a79cecb210300dd6b228a1e4e6a6958b0 Mon Sep 17 00:00:00 2001 From: Peng Li Date: Sat, 10 Mar 2018 11:29:26 +0800 Subject: [PATCH] net: hns3: fix rx path skb->truesize reporting bug BugLink: https://bugs.launchpad.net/bugs/1768670 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 Signed-off-by: David S. Miller (cherry picked from commit f8d291f00bb33c97b8c9dd643277d6300d05559d) Signed-off-by: dann frazier Acked-by: Stefan Bader Acked-by: Kleber Sacilotto de Souza Signed-off-by: Khalid Elmously --- 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 4dba97498b63..94f0b92ead38 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c +++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c @@ -2080,15 +2080,13 @@ 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())) -- 2.39.5