aboutsummaryrefslogtreecommitdiff
path: root/net/mac80211/ieee80211.c
diff options
context:
space:
mode:
authorJohannes Berg <johannes@sipsolutions.net>2007-12-19 02:03:33 +0100
committerDavid S. Miller <davem@davemloft.net>2008-01-28 15:09:38 -0800
commit5dfdaf58d61f06a458529430c24b1191ea4d1a27 (patch)
treebd3fac57f66e80bf2a31d253af19093f4020ba79 /net/mac80211/ieee80211.c
parent51fb61e76d952e6bc2fbdd9f0d38425fbab1cf31 (diff)
mac80211: add beacon configuration via cfg80211
This patch implements the cfg80211 hooks for configuring beaconing on an access point interface in mac80211. While doing so, it fixes a number of races that could badly crash the machine when the beacon is changed while being requested by the driver. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/mac80211/ieee80211.c')
-rw-r--r--net/mac80211/ieee80211.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/net/mac80211/ieee80211.c b/net/mac80211/ieee80211.c
index c9981701ef6..859682eee54 100644
--- a/net/mac80211/ieee80211.c
+++ b/net/mac80211/ieee80211.c
@@ -321,10 +321,17 @@ static int ieee80211_stop(struct net_device *dev)
dev_mc_unsync(local->mdev, dev);
- /* down all dependent devices, that is VLANs */
+ /* APs need special treatment */
if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
struct ieee80211_sub_if_data *vlan, *tmp;
+ struct beacon_data *old_beacon = sdata->u.ap.beacon;
+ /* remove beacon */
+ rcu_assign_pointer(sdata->u.ap.beacon, NULL);
+ synchronize_rcu();
+ kfree(old_beacon);
+
+ /* down all dependent devices, that is VLANs */
list_for_each_entry_safe(vlan, tmp, &sdata->u.ap.vlans,
u.vlan.list)
dev_close(vlan->dev);