From: Michal Sojka <michal.sojka@cvut.cz>
Date: Mon, 6 Aug 2018 11:48:46 +0000 (+0200)
Subject: Check open() errors correctly
X-Git-Url: https://rtime.felk.cvut.cz/gitweb/coffee/mt-apps.git/commitdiff_plain/80284beca5b4390af06cea749e304b5b78cd0393?ds=sidebyside

Check open() errors correctly
---

diff --git a/mt_keys.c b/mt_keys.c
index 9b1dcad..a209340 100644
--- a/mt_keys.c
+++ b/mt_keys.c
@@ -101,7 +101,7 @@ static void keys_cb(EV_P_ ev_io *w_, int revents)
 int mt_keys_init(mt_keys_t *self, struct ev_loop *loop, int fd)
 {
     int ev = open("/dev/input/by-path/platform-gpio-keys-event", O_RDONLY);
-    if (fd == -1) {
+    if (ev == -1) {
         perror("/dev/input/by-path/platform-gpio-keys-event");
         return -1;
     }