pktgen: fix crash at module unload

[linux-flexiantxendom0-3.2.10.git] / net / core / pktgen.c

diff --git a/net/core/pktgen.c b/net/core/pktgen.c
index 4d8ce93..77a5998 100644 (file)
--- a/net/core/pktgen.c
+++ b/net/core/pktgen.c
@@ -1931,7 +1931,7 @@ static int pktgen_device_event(struct notifier_block *unused,
 {
        struct net_device *dev = ptr;
 
-       if (!net_eq(dev_net(dev), &init_net))
+       if (!net_eq(dev_net(dev), &init_net) || pktgen_exiting)
                return NOTIFY_DONE;
 
        /* It is OK that we do not hold the group lock right now,
@@ -3755,12 +3755,18 @@ static void __exit pg_cleanup(void)
 {
        struct pktgen_thread *t;
        struct list_head *q, *n;
+       struct list_head list;
 
        /* Stop all interfaces & threads */
        pktgen_exiting = true;
 
-       list_for_each_safe(q, n, &pktgen_threads) {
+       mutex_lock(&pktgen_thread_lock);
+       list_splice(&list, &pktgen_threads);
+       mutex_unlock(&pktgen_thread_lock);
+
+       list_for_each_safe(q, n, &list) {
                t = list_entry(q, struct pktgen_thread, th_list);
+               list_del(&t->th_list);
                kthread_stop(t->tsk);
                kfree(t);
        }