uwb: use time_after() when purging stale beacons

Signed-off-by: David Vrabel <david.vrabel@csr.com>

diff --git a/drivers/uwb/beacon.c b/drivers/uwb/beacon.c
index f65a52c..1ccf9eb 100644 (file)
--- a/drivers/uwb/beacon.c
+++ b/drivers/uwb/beacon.c
@@ -298,11 +298,12 @@ struct uwb_beca_e *__uwb_beca_add(struct uwb_rc_evt_beacon *be,
 void uwb_beca_purge(void)
 {
        struct uwb_beca_e *bce, *next;
-       unsigned long now = jiffies;
+       unsigned long expires;
+
        mutex_lock(&uwb_beca.mutex);
        list_for_each_entry_safe(bce, next, &uwb_beca.list, node) {
-               if (now - bce->ts_jiffies
-                   > msecs_to_jiffies(beacon_timeout_ms)) {
+               expires = bce->ts_jiffies + msecs_to_jiffies(beacon_timeout_ms);
+               if (time_after(jiffies, expires)) {
                        uwbd_dev_offair(bce);
                        list_del(&bce->node);
                        uwb_bce_put(bce);