netpoll: Move rx enable/disable into __dev_close_many
Today netpoll_rx_enable and netpoll_rx_disable are called from
dev_close and and __dev_close, and not from dev_close_many.
Move the calls into __dev_close_many so that we have a single call
site to maintain, and so that dev_close_many gains this protection as
well. Which importantly makes batched network device deletes safe.
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/core/dev.c b/net/core/dev.c
index 98ba581..8d55fe7 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -1313,6 +1313,9 @@
might_sleep();
list_for_each_entry(dev, head, close_list) {
+ /* Temporarily disable netpoll until the interface is down */
+ netpoll_rx_disable(dev);
+
call_netdevice_notifiers(NETDEV_GOING_DOWN, dev);
clear_bit(__LINK_STATE_START, &dev->state);
@@ -1343,6 +1346,7 @@
dev->flags &= ~IFF_UP;
net_dmaengine_put();
+ netpoll_rx_enable(dev);
}
return 0;
@@ -1353,14 +1357,10 @@
int retval;
LIST_HEAD(single);
- /* Temporarily disable netpoll until the interface is down */
- netpoll_rx_disable(dev);
-
list_add(&dev->close_list, &single);
retval = __dev_close_many(&single);
list_del(&single);
- netpoll_rx_enable(dev);
return retval;
}
@@ -1398,14 +1398,9 @@
if (dev->flags & IFF_UP) {
LIST_HEAD(single);
- /* Block netpoll rx while the interface is going down */
- netpoll_rx_disable(dev);
-
list_add(&dev->close_list, &single);
dev_close_many(&single);
list_del(&single);
-
- netpoll_rx_enable(dev);
}
return 0;
}