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-rw-r--r--src/libudev/libudev-enumerate.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/src/libudev/libudev-enumerate.c b/src/libudev/libudev-enumerate.c
index 385829d464..bc1e37d341 100644
--- a/src/libudev/libudev-enumerate.c
+++ b/src/libudev/libudev-enumerate.c
@@ -721,12 +721,14 @@ static bool match_subsystem(struct udev_enumerate *udev_enumerate, const char *s
{
struct udev_list_entry *list_entry;
- subsystem = subsystem ? : "";
+ if (!subsystem)
+ return false;
udev_list_entry_foreach(list_entry, udev_list_get_entry(&udev_enumerate->subsystem_nomatch_list)) {
if (fnmatch(udev_list_entry_get_name(list_entry), subsystem, 0) == 0)
return false;
}
+
if (udev_list_get_entry(&udev_enumerate->subsystem_match_list) != NULL) {
udev_list_entry_foreach(list_entry, udev_list_get_entry(&udev_enumerate->subsystem_match_list)) {
if (fnmatch(udev_list_entry_get_name(list_entry), subsystem, 0) == 0)
@@ -734,6 +736,7 @@ static bool match_subsystem(struct udev_enumerate *udev_enumerate, const char *s
}
return false;
}
+
return true;
}