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Johannes Berg b20d34c458 mac80211: fix station entry leak/warning while suspending 
Since Stanislaw's patches, when suspending while connected,
cfg80211 will disconnect. This causes the AP station to be
removed, which uses call_rcu() to clean up. Due to needing
process context, this queues a work struct on the mac80211
workqueue. This will warn and fail when already suspended,
which can happen if the rcu call doesn't happen quickly.

To fix this, replace the synchronize_net() which is really
just synchronize_rcu_expedited() with rcu_barrier(), which
unlike synchronize_rcu() waits until RCU callback have run
and thus avoids this issue.

In theory, this can even happen without Stanislaw's change
to disconnect on suspend since userspace might disconnect
just before suspending, though then it's unlikely that the
call_rcu() will be delayed long enough.

Cc: stable@vger.kernel.org [3.7+]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
 		2013-04-17 11:40:39 +02:00
..
9p hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
802 mrp: make mrp_rcv static 2013-02-11 14:16:26 -05:00
8021q net: proc: change proc_net_remove to remove_proc_entry 2013-02-18 14:53:08 -05:00
appletalk hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
atm hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
ax25 hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
batman-adv hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
bluetooth hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
bridge hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
caif Merge branch 'master' into for-next 2013-01-29 10:48:30 +01:00
can hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
ceph Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client 2013-02-28 17:43:09 -08:00
core hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
dcb net: Allow DCBnl to use other namespaces besides init_net 2012-12-10 14:09:01 -05:00
dccp Driver core patches for 3.9-rc1 2013-02-21 12:05:51 -08:00
decnet hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
dns_resolver Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security 2012-12-16 15:40:50 -08:00
dsa dsa: make dsa_switch_setup check for valid port names 2013-01-21 15:40:12 -05:00
ethernet net: split eth_mac_addr for better error handling 2013-01-21 14:07:44 -05:00
ieee802154 hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
ipv4 hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
ipv6 hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
ipx hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
irda Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2013-02-21 17:40:58 -08:00
iucv hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
key hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
l2tp hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
lapb net/lapb: remove depends on CONFIG_EXPERIMENTAL 2013-01-11 11:40:01 -08:00
llc hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
mac80211 mac80211: fix station entry leak/warning while suspending 2013-04-17 11:40:39 +02:00
mac802154 Driver core patches for 3.9-rc1 2013-02-21 12:05:51 -08:00
netfilter hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
netlabel Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2012-10-02 13:38:27 -07:00
netlink hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
netrom hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
nfc hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
openvswitch hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
packet hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
phonet hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
rds hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
rfkill net: rfkill: Fix sparse warning in rfkill-regulator.c 2013-03-06 16:35:41 +01:00
rose hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
rxrpc Driver core patches for 3.9-rc1 2013-02-21 12:05:51 -08:00
sched hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
sctp hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
sunrpc NFS client bugfixes for Linux 3.9 2013-03-02 16:46:07 -08:00
tipc hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
unix hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
vmw_vsock VSOCK: Don't reject PF_VSOCK protocol 2013-02-18 15:02:51 -05:00
wimax
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wireless cfg80211: add ieee80211_operating_class_to_band 2013-04-16 15:29:43 +02:00
x25 hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
xfrm hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
Kconfig Driver core patches for 3.9-rc1 2013-02-21 12:05:51 -08:00
Makefile VSOCK: Introduce VM Sockets 2013-02-10 19:41:08 -05:00
compat.c make get_file() return its argument 2012-09-26 21:10:25 -04:00
nonet.c
…
socket.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2013-02-26 20:16:07 -08:00
sysctl_net.c user_ns: get rid of duplicate code in net_ctl_permissions 2012-11-18 20:32:45 -05:00