diff mbox series

[net-next,4/5] net: hns3: optimized the judgment of the input parameters of dump ncl config

Message ID 1589016461-10130-5-git-send-email-tanhuazhong@huawei.com
State New
Headers show
Series None | expand

Commit Message

Huazhong Tan May 9, 2020, 9:27 a.m. UTC 
From: Yufeng Mo <moyufeng@huawei.com>

This patch optimizes the judgment of the input parameters of dump ncl
config by checking the number and value of the input parameters apart.
It's clearer and more reasonable.

Signed-off-by: Yufeng Mo <moyufeng@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
---
 .../net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c    | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c
index 6cfa825..48c115c 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c
@@ -1258,6 +1258,7 @@  static void hclge_dbg_dump_ncl_config(struct hclge_dev *hdev,
 {
 #define HCLGE_MAX_NCL_CONFIG_OFFSET	4096
 #define HCLGE_NCL_CONFIG_LENGTH_IN_EACH_CMD	(20 + 24 * 4)
+#define HCLGE_NCL_CONFIG_PARAM_NUM	2
 
 	struct hclge_desc desc[HCLGE_CMD_NCL_CONFIG_BD_NUM];
 	int bd_num = HCLGE_CMD_NCL_CONFIG_BD_NUM;
@@ -1267,13 +1268,17 @@  static void hclge_dbg_dump_ncl_config(struct hclge_dev *hdev,
 	int ret;
 
 	ret = sscanf(cmd_buf, "%x %x", &offset, &length);
-	if (ret != 2 || offset >= HCLGE_MAX_NCL_CONFIG_OFFSET ||
-	    length > HCLGE_MAX_NCL_CONFIG_OFFSET - offset) {
-		dev_err(&hdev->pdev->dev, "Invalid offset or length.\n");
+	if (ret != HCLGE_NCL_CONFIG_PARAM_NUM) {
+		dev_err(&hdev->pdev->dev,
+			"Too few parameters, num = %d.\n", ret);
 		return;
 	}
-	if (offset < 0 || length <= 0) {
-		dev_err(&hdev->pdev->dev, "Non-positive offset or length.\n");
+
+	if (offset < 0 || offset >= HCLGE_MAX_NCL_CONFIG_OFFSET ||
+	    length <= 0 || length > HCLGE_MAX_NCL_CONFIG_OFFSET - offset) {
+		dev_err(&hdev->pdev->dev,
+			"Invalid input, offset = %d, length = %d.\n",
+			offset, length);
 		return;
 	}