Driver gets rss information from the last descriptor of the packet.
When driver handle the rss type, ring->next_to_clean indicates the
first descriptor of next packet.
This patch fix the descriptor index with "ring->next_to_clean - 1".
Fixes: 232fc64b6e62 ("net: hns3: Add HW RSS hash information to RX skb")
Signed-off-by: Peng Li <lipeng...@huawei.com>
---
drivers/net/ethernet/hisilicon/hns3/hns3_enet.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
index 624b8a7..d3b9aaf 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
@@ -2550,9 +2550,16 @@ static void hns3_set_gro_param(struct sk_buff *skb, u32
l234info,
static void hns3_set_rx_skb_rss_type(struct hns3_enet_ring *ring,
struct sk_buff *skb)
{
- struct hns3_desc *desc = &ring->desc[ring->next_to_clean];
struct hnae3_handle *handle = ring->tqp->handle;
enum pkt_hash_types rss_type;
+ struct hns3_desc *desc;
+ int last_bd;
+
+ /* When driver handle the rss type, ring->next_to_clean indicates the
+ * first descriptor of next packet, need -1 here.
+ */
+ last_bd = (ring->next_to_clean - 1 + ring->desc_num) % ring->desc_num;
+ desc = &ring->desc[last_bd];
if (le32_to_cpu(desc->rx.rss_hash))
rss_type = handle->kinfo.rss_type;
--
1.9.1
