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| author | Eric W. Biederman <ebiederm@xmission.com> | 2014-03-27 15:38:17 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-03-29 17:58:37 -0400 |
| commit | 3f4df2066b4e02cb609fa33b2eae8403b5821f4f (patch) | |
| tree | e960a9af040e91c50c9bb56c48a76a4c873006e6 /net/core | |
| parent | 944e294857033dbe519a136cad05dc4e2570874e (diff) | |
| download | blackbird-op-linux-3f4df2066b4e02cb609fa33b2eae8403b5821f4f.tar.gz blackbird-op-linux-3f4df2066b4e02cb609fa33b2eae8403b5821f4f.zip | |
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>
Diffstat (limited to 'net/core')
| -rw-r--r-- | net/core/dev.c | 13 |
1 files changed, 4 insertions, 9 deletions
diff --git a/net/core/dev.c b/net/core/dev.c index 98ba581b89f0..8d55fe780e3f 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -1313,6 +1313,9 @@ static int __dev_close_many(struct list_head *head) 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 @@ static int __dev_close_many(struct list_head *head) dev->flags &= ~IFF_UP; net_dmaengine_put(); + netpoll_rx_enable(dev); } return 0; @@ -1353,14 +1357,10 @@ static int __dev_close(struct net_device *dev) 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 @@ int dev_close(struct net_device *dev) 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; } |
