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Commit e8baff89 authored by Huazhong Tan's avatar Huazhong Tan Committed by Greg Kroah-Hartman
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net: hns: fix skb->truesize underestimation 



[ Upstream commit b1ccd4c0ab6ef499f47dd84ed4920502a7147bba ]

skb->truesize is not meant to be tracking amount of used bytes in a skb,
but amount of reserved/consumed bytes in memory.

For instance, if we use a single byte in last page fragment, we have to
account the full size of the fragment.

So skb_add_rx_frag needs to calculate the length of the entire buffer into
turesize.

Fixes: 9cbe9fd5 ("net: hns: optimize XGE capability by reducing cpu usage")
Signed-off-by: default avatarHuazhong tan <tanhuazhong@huawei.com>
Signed-off-by: default avatarSalil Mehta <salil.mehta@huawei.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
Signed-off-by: default avatarSasha Levin <alexander.levin@microsoft.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 333f2612

drivers/net/ethernet/hisilicon/hns/hns_enet.c

+1 −1
Original line number Diff line number Diff line
@@ -530,7 +530,7 @@ static void hns_nic_reuse_page(struct sk_buff *skb, int i, 
	}



	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()))