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authorJohannes Berg <johannes.berg@intel.com>2012-06-20 20:11:33 +0200
committerJohannes Berg <johannes.berg@intel.com>2012-06-20 20:12:12 +0200
commit0f6b3f597daab2254614e2773e322e73fb1b6f4b (patch)
tree88a4d19016a1564598e9e083444d1948dae5c99d /net/mac80211/offchannel.c
parent3bfda62c50b0a4b118dcfce36686508ca2892292 (diff)
mac80211: fix double-start of remain-on-channel
When a remain-on-channel item is deleted, we remove it from the list and then start the next item. However, if it wasn't actually the first item then calling ieee80211_start_next_roc() is wrong as it will start the first item -- even if that was already started. Fix the two places that do this and add a warning to prevent the problem from reoccurring. Reported-by: Eliad Peller <eliad@wizery.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/mac80211/offchannel.c')
-rw-r--r--net/mac80211/offchannel.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/net/mac80211/offchannel.c b/net/mac80211/offchannel.c
index febce7fb7bb1..7f93626ddc61 100644
--- a/net/mac80211/offchannel.c
+++ b/net/mac80211/offchannel.c
@@ -262,6 +262,9 @@ void ieee80211_start_next_roc(struct ieee80211_local *local)
roc = list_first_entry(&local->roc_list, struct ieee80211_roc_work,
list);
+ if (WARN_ON_ONCE(roc->started))
+ return;
+
if (local->ops->remain_on_channel) {
int ret, duration = roc->duration;
@@ -377,7 +380,8 @@ void ieee80211_sw_roc_work(struct work_struct *work)
ieee80211_recalc_idle(local);
- ieee80211_start_next_roc(local);
+ if (roc->started)
+ ieee80211_start_next_roc(local);
}
out_unlock: