iwlwifi: manage IBSS station properly

Currently iwlwifi will eventually exhaust the station
table when adding the BSSID station for IBSS mode,
unless the interface is set down.

The new mac80211 ibss joined/left notification allows
us to fix that easily by moving the code to add the
IBSS station to the notification, and also adding
code to remove it again when we leave the IBSS.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>

1 files changed, 6 insertions, 1 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-sta.c b/drivers/net/wireless/iwlwifi/iwl-sta.c
index 354eb13a8515..7da8edeb5256 100644
--- a/drivers/net/wireless/iwlwifi/iwl-sta.c
+++ b/drivers/net/wireless/iwlwifi/iwl-sta.c
@@ -596,7 +596,7 @@ static int iwl_send_remove_station(struct iwl_priv *priv,
 /**
  * iwl_remove_station - Remove driver's knowledge of station.
  */
-static int iwl_remove_station(struct iwl_priv *priv, const u8 *addr)
+int iwl_remove_station(struct iwl_priv *priv, const u8 *addr)
 {
         int sta_id = IWL_INVALID_STATION;
         int i, ret = -EINVAL;
@@ -647,6 +647,10 @@ static int iwl_remove_station(struct iwl_priv *priv, const u8 *addr)
                 goto out;
         }
 
+        if (priv->stations[sta_id].used & IWL_STA_LOCAL) {
+                kfree(priv->stations[sta_id].lq);
+                priv->stations[sta_id].lq = NULL;
+        }
 
         priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
 
@@ -663,6 +667,7 @@ out:
         spin_unlock_irqrestore(&priv->sta_lock, flags);
         return ret;
 }
+EXPORT_SYMBOL_GPL(iwl_remove_station);
 
 /**
  * iwl_clear_ucode_stations() - clear entire station table driver and/or ucode