From 6b80a1a61e1c55b5da2f83cf91bc1e4d03f9be2c Mon Sep 17 00:00:00 2001
From: Marian Buschsieweke <marian.buschsieweke@ml-pa.com>
Date: Mon, 28 Oct 2024 14:50:42 +0100
Subject: [PATCH] sys/usb: Use luid_base for stable USB serials

This is useful when having multiple instances of the same board
connected via USB CDC ACM and telling the TTYs apart.
---
 sys/usb/usbus/usbus.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sys/usb/usbus/usbus.c b/sys/usb/usbus/usbus.c
index db38ca923e..9dd3dedbec 100644
--- a/sys/usb/usbus/usbus.c
+++ b/sys/usb/usbus/usbus.c
@@ -422,7 +422,7 @@ static void *_usbus_thread(void *args)
                   "USB serial byte length must be at most 63 due to protocol "
                   "limitations");
     uint8_t luid_buf[CONFIG_USB_SERIAL_BYTE_LENGTH];
-    luid_get(luid_buf, sizeof(luid_buf));
+    luid_base(luid_buf, sizeof(luid_buf));
     fmt_bytes_hex(usbus->serial_str, luid_buf, sizeof(luid_buf));
     usbus_add_string_descriptor(usbus, &usbus->serial, usbus->serial_str);
 #endif