From c01583344fb7e63df204849214c1a8da0c033e03 Mon Sep 17 00:00:00 2001
From: Peng Li <lipeng321@huawei.com>
Date: Sat, 24 Jul 2021 15:43:33 +0800
Subject: [PATCH 045/283] net: hns3: refactor out hclge_cmd_convert_err_code()

mainline inclusion
from mainline-v5.12-rc1-dontuse
commit 1c9a98b0ba1f16490ea0d492a1cd606f3a4b1bee
category: feature
bugzilla: https://gitee.com/src-openeuler/kernel/issues/I8EMQV
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1c9a98b0ba1f16490ea0d492a1cd606f3a4b1bee

----------------------------------------------------------------------

To improve code readability and maintainability, refactor
hclge_cmd_convert_err_code() with an array of imp_errcode
and common_errno mapping, instead of a bloated switch/case.

Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Reviewed-by: Yongxin Li <liyongxin1@huawei.com>
Signed-off-by: Junxin Chen <chenjunxin1@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>
Signed-off-by: Xiaodong Li <lixiaodong67@huawei.com>
---
 .../hisilicon/hns3/hns3pf/hclge_cmd.c         | 55 +++++++++----------
 1 file changed, 27 insertions(+), 28 deletions(-)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_cmd.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_cmd.c
index 1b986185d145..5f0c645eb292 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_cmd.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_cmd.c
@@ -205,36 +205,35 @@ static bool hclge_is_special_opcode(u16 opcode)
 	return false;
 }
 
+struct errcode {
+	u32 imp_errcode;
+	int common_errno;
+};
+
 static int hclge_cmd_convert_err_code(u16 desc_ret)
 {
-	switch (desc_ret) {
-	case HCLGE_CMD_EXEC_SUCCESS:
-		return 0;
-	case HCLGE_CMD_NO_AUTH:
-		return -EPERM;
-	case HCLGE_CMD_NOT_SUPPORTED:
-		return -EOPNOTSUPP;
-	case HCLGE_CMD_QUEUE_FULL:
-		return -EXFULL;
-	case HCLGE_CMD_NEXT_ERR:
-		return -ENOSR;
-	case HCLGE_CMD_UNEXE_ERR:
-		return -ENOTBLK;
-	case HCLGE_CMD_PARA_ERR:
-		return -EINVAL;
-	case HCLGE_CMD_RESULT_ERR:
-		return -ERANGE;
-	case HCLGE_CMD_TIMEOUT:
-		return -ETIME;
-	case HCLGE_CMD_HILINK_ERR:
-		return -ENOLINK;
-	case HCLGE_CMD_QUEUE_ILLEGAL:
-		return -ENXIO;
-	case HCLGE_CMD_INVALID:
-		return -EBADR;
-	default:
-		return -EIO;
-	}
+	struct errcode hclge_cmd_errcode[] = {
+		{HCLGE_CMD_EXEC_SUCCESS, 0},
+		{HCLGE_CMD_NO_AUTH, -EPERM},
+		{HCLGE_CMD_NOT_SUPPORTED, -EOPNOTSUPP},
+		{HCLGE_CMD_QUEUE_FULL, -EXFULL},
+		{HCLGE_CMD_NEXT_ERR, -ENOSR},
+		{HCLGE_CMD_UNEXE_ERR, -ENOTBLK},
+		{HCLGE_CMD_PARA_ERR, -EINVAL},
+		{HCLGE_CMD_RESULT_ERR, -ERANGE},
+		{HCLGE_CMD_TIMEOUT, -ETIME},
+		{HCLGE_CMD_HILINK_ERR, -ENOLINK},
+		{HCLGE_CMD_QUEUE_ILLEGAL, -ENXIO},
+		{HCLGE_CMD_INVALID, -EBADR},
+	};
+	u32 errcode_count = ARRAY_SIZE(hclge_cmd_errcode);
+	u32 i;
+
+	for (i = 0; i < errcode_count; i++)
+		if (hclge_cmd_errcode[i].imp_errcode == desc_ret)
+			return hclge_cmd_errcode[i].common_errno;
+
+	return -EIO;
 }
 
 static int hclge_cmd_check_retval(struct hclge_hw *hw, struct hclge_desc *desc,
-- 
2.34.1

