From: Yunsheng Lin <linyunsheng@huawei.com>
Date: Wed, 20 Sep 2017 18:52:54 +0800
Subject: net: hns3: Fix for rx_priv_buf_alloc not setting rx shared buffer
Patch-mainline: v4.14-rc2
Git-commit: b8c8bf47da5576657370798da6f18a8cb0245d5b
References: bsc#1104353 FATE#326415

rx_priv_buf_alloc is used to tell hardware how much buffer is
used for rx direction, right now only the private buffer is
assigned.
For ae_dev that doesn't support DCB, private rx buffer is assigned
to zero, only shared rx buffer is used. So not setting the shared
rx buffer cause dropping of packet in SSU.

Fixes: 46a3df9f9718 ("net: hns3: Add HNS3 Acceleration Engine & Compatibility Layer Support")
Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_cmd.h  |    3 ++-
 drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c |    4 ++++
 2 files changed, 6 insertions(+), 1 deletion(-)

--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_cmd.h
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_cmd.h
@@ -270,7 +270,8 @@ struct hclge_tx_buff_alloc {
 
 struct hclge_rx_priv_buff {
 	__le16 buf_num[HCLGE_TC_NUM];
-	u8 rsv[8];
+	__le16 shared_buf;
+	u8 rsv[6];
 };
 
 struct hclge_query_version {
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
@@ -1622,6 +1622,10 @@ static int hclge_rx_priv_buf_alloc(struc
 			cpu_to_le16(true << HCLGE_TC0_PRI_BUF_EN_B);
 	}
 
+	req->shared_buf =
+		cpu_to_le16((hdev->s_buf.buf_size >> HCLGE_BUF_UNIT_S) |
+			    (1 << HCLGE_TC0_PRI_BUF_EN_B));
+
 	ret = hclge_cmd_send(&hdev->hw, &desc, 1);
 	if (ret) {
 		dev_err(&hdev->pdev->dev,