iwlwifi: report error when detect failure during stop agg queue

This fix related to bug 1921 at
http://www.intellinuxwireless.org/bugzilla/show_bug.cgi?id=1921

when detect error during stopping tx aggregation queue, report the error to
help identify the problem.

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-sta.c b/drivers/net/wireless/iwlwifi/iwl-sta.c
index 1684490d93c0..5798fe49c771 100644
--- a/drivers/net/wireless/iwlwifi/iwl-sta.c
+++ b/drivers/net/wireless/iwlwifi/iwl-sta.c
@@ -1138,8 +1138,10 @@ int iwl_sta_rx_agg_stop(struct iwl_priv *priv, const u8 *addr, int tid)
         int sta_id;
 
         sta_id = iwl_find_station(priv, addr);
-        if (sta_id == IWL_INVALID_STATION)
+        if (sta_id == IWL_INVALID_STATION) {
+                IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
                 return -ENXIO;
+        }
 
         spin_lock_irqsave(&priv->sta_lock, flags);
         priv->stations[sta_id].sta.station_flags_msk = 0;