phonet: use call_rcu for phonet device free

Use call_rcu rather than synchronize_rcu.

Signed-off-by: Jiri Pirko <jpirko@redhat.com>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 11 insertions, 4 deletions

diff --git a/net/phonet/pn_dev.c b/net/phonet/pn_dev.c
index c33da6576942..b18e48fae975 100644
--- a/net/phonet/pn_dev.c
+++ b/net/phonet/pn_dev.c
@@ -162,6 +162,14 @@ int phonet_address_add(struct net_device *dev, u8 addr)
         return err;
 }
 
+static void phonet_device_rcu_free(struct rcu_head *head)
+{
+        struct phonet_device *pnd;
+
+        pnd = container_of(head, struct phonet_device, rcu);
+        kfree(pnd);
+}
+
 int phonet_address_del(struct net_device *dev, u8 addr)
 {
         struct phonet_device_list *pndevs = phonet_device_list(dev_net(dev));
@@ -179,10 +187,9 @@ int phonet_address_del(struct net_device *dev, u8 addr)
                 pnd = NULL;
         mutex_unlock(&pndevs->lock);
 
-        if (pnd) {
-                synchronize_rcu();
-                kfree(pnd);
-        }
+        if (pnd)
+                call_rcu(&pnd->rcu, phonet_device_rcu_free);
+
         return err;
 }