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| author | Cong Wang <amwang@redhat.com> | 2013-08-07 16:43:22 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-08-09 11:41:45 -0700 |
| commit | ffbe4a539f69fa3e2f3be74627ca2c830f9d923b (patch) | |
| tree | 3bb4e4ebfe8eb440ff7ee0246103b4acea8fc93b | |
| parent | 614334df2d6dcc5e15eaa8066a649535d50f329b (diff) | |
| download | linux-stable-ffbe4a539f69fa3e2f3be74627ca2c830f9d923b.tar.gz linux-stable-ffbe4a539f69fa3e2f3be74627ca2c830f9d923b.tar.bz2 linux-stable-ffbe4a539f69fa3e2f3be74627ca2c830f9d923b.zip | |
vxlan: fix a soft lockup in vxlan module removal
This is a regression introduced by:
commit fe5c3561e6f0ac7c9546209f01351113c1b77ec8
Author: stephen hemminger <stephen@networkplumber.org>
Date: Sat Jul 13 10:18:18 2013 -0700
vxlan: add necessary locking on device removal
The problem is that vxlan_dellink(), which is called with RTNL lock
held, tries to flush the workqueue synchronously, but apparently
igmp_join and igmp_leave work need to hold RTNL lock too, therefore we
have a soft lockup!
As suggested by Stephen, probably the flush_workqueue can just be
removed and let the normal refcounting work. The workqueue has a
reference to device and socket, therefore the cleanups should work
correctly.
Suggested-by: Stephen Hemminger <stephen@networkplumber.org>
Cc: Stephen Hemminger <stephen@networkplumber.org>
Cc: David S. Miller <davem@davemloft.net>
Tested-by: Cong Wang <amwang@redhat.com>
Signed-off-by: Cong Wang <amwang@redhat.com>
Acked-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/vxlan.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c index 11a6c03d202a..767f7af3bd40 100644 --- a/drivers/net/vxlan.c +++ b/drivers/net/vxlan.c @@ -1793,8 +1793,6 @@ static void vxlan_dellink(struct net_device *dev, struct list_head *head) struct vxlan_net *vn = net_generic(dev_net(dev), vxlan_net_id); struct vxlan_dev *vxlan = netdev_priv(dev); - flush_workqueue(vxlan_wq); - spin_lock(&vn->sock_lock); hlist_del_rcu(&vxlan->hlist); spin_unlock(&vn->sock_lock); |