From: Lipeng <lipeng321@huawei.com>
Date: Tue, 24 Oct 2017 21:02:12 +0800
Subject: net: hns3: fix the bug when reuse command description in
 hclge_add_mac_vlan_tbl
Patch-mainline: v4.15-rc1
Git-commit: c3b6f755fdcd2c0d8342c01e630741928a7c62ab
References: bsc#1104353 FATE#326415

When reusing a command description read from HW, driver should set
IN_VLD bit, WR bit and NO_INTR bit. If IN_VLD bit and NO_INTR bit
are not set, the command fails and driver prints error message:

[  135.261284] hns3 0000:7d:00.0: cmdq execute failed for get_mac_vlan_cmd_status,status=2.
[  135.270983] hns3 0000:7d:00.0: add mac addr failed for cmd_send, ret =-5.

This patch fixes the bug.
Fixes: 46a3df9 (net: hns3: Add HNS3 Acceleration Engine & Compatibility Layer Support)

Signed-off-by: Lipeng <lipeng321@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_main.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
@@ -3600,11 +3600,11 @@ static int hclge_add_mac_vlan_tbl(struct
 							   resp_code,
 							   HCLGE_MAC_VLAN_ADD);
 	} else {
-		mc_desc[0].flag &= cpu_to_le16(~HCLGE_CMD_FLAG_WR);
+		hclge_cmd_reuse_desc(&mc_desc[0], false);
 		mc_desc[0].flag |= cpu_to_le16(HCLGE_CMD_FLAG_NEXT);
-		mc_desc[1].flag &= cpu_to_le16(~HCLGE_CMD_FLAG_WR);
+		hclge_cmd_reuse_desc(&mc_desc[1], false);
 		mc_desc[1].flag |= cpu_to_le16(HCLGE_CMD_FLAG_NEXT);
-		mc_desc[2].flag &= cpu_to_le16(~HCLGE_CMD_FLAG_WR);
+		hclge_cmd_reuse_desc(&mc_desc[2], false);
 		mc_desc[2].flag &= cpu_to_le16(~HCLGE_CMD_FLAG_NEXT);
 		memcpy(mc_desc[0].data, req,
 		       sizeof(struct hclge_mac_vlan_tbl_entry_cmd));