From b68dc9af6db53de231d5ac71f9b6ba2ff3057a68 Mon Sep 17 00:00:00 2001
From: Peter Wu <peter@lekensteyn.nl>
Date: Sun, 14 Jun 2020 22:59:19 +0200
Subject: ltunify: fix harmless compiler warning

bInterfaceNumber is expected to return the `%02x` format according to
the current kernel sources. Even if that is not true, a user can always
manually specify the hidraw device if the wrong device is detected.
---
 ltunify.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'ltunify.c')

diff --git a/ltunify.c b/ltunify.c
index 1e685b4..9625776 100644
--- a/ltunify.c
+++ b/ltunify.c
@@ -1214,7 +1214,10 @@ int open_hidraw(void) {
 				if (pid == PID_NANO_RECEIVER_2) {
 					int iface = -1;
 					if ((fp = fopen_format("/sys/class/hidraw/%s/device/../bInterfaceNumber", dev_name))) {
-						fscanf(fp, "%02x", &iface);
+						int m = fscanf(fp, "%02x", &iface);
+						if (m != 1) {
+							iface = -1;
+						}
 						fclose(fp);
 					}
 					if (iface == 0) {
-- 
cgit v1.2.1