diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_debugfs.c b/drivers/net/ethernet/hisilicon/hns3/hns3_debugfs.c
index f504e64917df3e375e2079d2458743a1f4fc353b..d51134f34a289ce0312832f8b81ba56f8654b30f 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_debugfs.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_debugfs.c
@@ -130,7 +130,7 @@ static struct hns3_dbg_cmd_info hns3_dbg_cmd[] = {
 		.name = "tx_bd_queue",
 		.cmd = HNAE3_DBG_CMD_TX_BD,
 		.dentry = HNS3_DBG_DENTRY_TX_BD,
-		.buf_len = HNS3_DBG_READ_LEN_4MB,
+		.buf_len = HNS3_DBG_READ_LEN_5MB,
 		.init = hns3_dbg_bd_file_init,
 	},
 	{
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_debugfs.h b/drivers/net/ethernet/hisilicon/hns3/hns3_debugfs.h
index 97578eabb7d8b7a2defc1ac1422bb77f29b1f6bf..4a5ef8a90a1046883416f00648e5f47ff2a42721 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_debugfs.h
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_debugfs.h
@@ -10,6 +10,7 @@
 #define HNS3_DBG_READ_LEN_128KB	0x20000
 #define HNS3_DBG_READ_LEN_1MB	0x100000
 #define HNS3_DBG_READ_LEN_4MB	0x400000
+#define HNS3_DBG_READ_LEN_5MB	0x500000
 #define HNS3_DBG_WRITE_LEN	1024
 
 #define HNS3_DBG_DATA_STR_LEN	32