Check for fd failure properly
@@ -242,7 +242,7 @@ static size_t explicit_find_gpus(struct wlr_session *session,
}
ret[i] = open_if_kms(session, ptr);
- if (ret[i] <= 0) {
+ if (ret[i] < 0) {
wlr_log(L_ERROR, "Unable to open %s as DRM device", ptr);
} else {
++i;
