mac80211: let key iteration get keys in install order

ieee80211_iter_keys() currently returns keys in
the backward order they were installed in, which
is a bit confusing. Add them to the tail of the
key list to make sure iterations go in the same
order that keys were originally installed in.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

2 files changed, 5 insertions, 1 deletions

diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 9e91b4f47843..972109f06a70 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -2987,6 +2987,10 @@ void ieee80211_sta_block_awake(struct ieee80211_hw *hw,
  * needs reprogramming of the keys during suspend. Note that due
  * to locking reasons, it is also only safe to call this at few
  * spots since it must hold the RTNL and be able to sleep.
+ *
+ * The order in which the keys are iterated matches the order
+ * in which they were originally installed and handed to the
+ * set_key callback.
  */
 void ieee80211_iter_keys(struct ieee80211_hw *hw,
                          struct ieee80211_vif *vif,
diff --git a/net/mac80211/key.c b/net/mac80211/key.c
index 739bee13e813..5150c6d11b57 100644
--- a/net/mac80211/key.c
+++ b/net/mac80211/key.c
@@ -278,7 +278,7 @@ static void __ieee80211_key_replace(struct ieee80211_sub_if_data *sdata,
         bool defunikey, defmultikey, defmgmtkey;
 
         if (new)
-                list_add(&new->list, &sdata->key_list);
+                list_add_tail(&new->list, &sdata->key_list);
 
         if (sta && pairwise) {
                 rcu_assign_pointer(sta->ptk, new);