Upgrade to 4.4.50-rt62

[kvmfornfv.git] / kernel / net / sched / cls_flower.c

diff --git a/kernel/net/sched/cls_flower.c b/kernel/net/sched/cls_flower.c
index 95b0212..e5a58c8 100644 (file)
--- a/kernel/net/sched/cls_flower.c
+++ b/kernel/net/sched/cls_flower.c
@@ -13,6 +13,7 @@
 #include <linux/init.h>
 #include <linux/module.h>
 #include <linux/rhashtable.h>
+#include <linux/workqueue.h>
 
 #include <linux/if_ether.h>
 #include <linux/in6.h>
@@ -55,7 +56,10 @@ struct cls_fl_head {
        bool mask_assigned;
        struct list_head filters;
        struct rhashtable_params ht_params;
-       struct rcu_head rcu;
+       union {
+               struct work_struct work;
+               struct rcu_head rcu;
+       };
 };
 
 struct cls_fl_filter {
@@ -165,6 +169,24 @@ static void fl_destroy_filter(struct rcu_head *head)
        kfree(f);
 }
 
+static void fl_destroy_sleepable(struct work_struct *work)
+{
+       struct cls_fl_head *head = container_of(work, struct cls_fl_head,
+                                               work);
+       if (head->mask_assigned)
+               rhashtable_destroy(&head->ht);
+       kfree(head);
+       module_put(THIS_MODULE);
+}
+
+static void fl_destroy_rcu(struct rcu_head *rcu)
+{
+       struct cls_fl_head *head = container_of(rcu, struct cls_fl_head, rcu);
+
+       INIT_WORK(&head->work, fl_destroy_sleepable);
+       schedule_work(&head->work);
+}
+
 static bool fl_destroy(struct tcf_proto *tp, bool force)
 {
        struct cls_fl_head *head = rtnl_dereference(tp->root);
@@ -177,10 +199,9 @@ static bool fl_destroy(struct tcf_proto *tp, bool force)
                list_del_rcu(&f->list);
                call_rcu(&f->rcu, fl_destroy_filter);
        }
-       RCU_INIT_POINTER(tp->root, NULL);
-       if (head->mask_assigned)
-               rhashtable_destroy(&head->ht);
-       kfree_rcu(head, rcu);
+
+       __module_get(THIS_MODULE);
+       call_rcu(&head->rcu, fl_destroy_rcu);
        return true;
 }