From 31a16f99e02c2e0b40a5fb05d66f5e56721027e2 Mon Sep 17 00:00:00 2001 From: Peng Li Date: Thu, 20 Dec 2018 11:52:05 +0800 Subject: [PATCH] net: hns3: fix the descriptor index when get rss type 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 Signed-off-by: David S. Miller --- 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 624b8a733db5..d3b9aaf96c1c 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; -- 2.30.2