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authorJohannes Berg <johannes@sipsolutions.net>2009-01-23 22:54:03 +0100
committerJohn W. Linville <linville@tuxdriver.com>2009-01-29 16:01:45 -0500
commitc771c9d8da1e8292ef8bf7fd4ce135dacc650130 (patch)
tree79b259a6b0396cbecf9e775c7ba5a80e2c4d94c9 /net/mac80211/util.c
parent506d03f97d10e54fd27c58c872a98242326d6419 (diff)
mac80211: add interface list lock
Using only the RTNL has a number of problems, most notably that ieee80211_iterate_active_interfaces() and other interface list traversals cannot be done from the internal workqueue because it needs to be flushed under the RTNL. This patch introduces a new mutex that protects the interface list against modifications. A more detailed explanation is part of the code change. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/mac80211/util.c')
-rw-r--r--net/mac80211/util.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index fc30f2940e1..73c7d7345ab 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -468,7 +468,7 @@ void ieee80211_iterate_active_interfaces(
struct ieee80211_local *local = hw_to_local(hw);
struct ieee80211_sub_if_data *sdata;
- rtnl_lock();
+ mutex_lock(&local->iflist_mtx);
list_for_each_entry(sdata, &local->interfaces, list) {
switch (sdata->vif.type) {
@@ -489,7 +489,7 @@ void ieee80211_iterate_active_interfaces(
&sdata->vif);
}
- rtnl_unlock();
+ mutex_unlock(&local->iflist_mtx);
}
EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);