From: Jian Shen <[email protected]>
HW can not guarantee complete write desc->rx.size, even though
HNS3_RXD_VLD_B has been set. Driver needs to add rmb() instruction
to make sure desc->rx.size is always valid.
Fixes: e55970950556 ("net: hns3: Add handling of GRO Pkts not fully RX'ed in
NAPI poll")
Signed-off-by: Jian Shen <[email protected]>
Signed-off-by: Huazhong Tan <[email protected]>
---
drivers/net/ethernet/hisilicon/hns3/hns3_enet.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
index 1bf7a5f..26d3bf4 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
@@ -2476,6 +2476,8 @@ static int hns3_add_frag(struct hns3_enet_ring *ring,
struct hns3_desc *desc,
desc = &ring->desc[ring->next_to_clean];
desc_cb = &ring->desc_cb[ring->next_to_clean];
bd_base_info = le32_to_cpu(desc->rx.bd_base_info);
+ /* make sure HW write desc complete */
+ rmb();
if (!hnae3_get_bit(bd_base_info, HNS3_RXD_VLD_B))
return -ENXIO;
--
2.7.4
