iwlwifi: need check for valid qos packet before free

commit ece6444c2fe80dab679beb5f0d58b091f1933b00 upstream.

For 4965, need to check it is valid qos frame before free, only valid
QoS frame has the tid used to free the packets.

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 9 insertions, 4 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-4965.c b/drivers/net/wireless/iwlwifi/iwl-4965.c
index 11fc639903fe..3f0a234b5966 100644
--- a/drivers/net/wireless/iwlwifi/iwl-4965.c
+++ b/drivers/net/wireless/iwlwifi/iwl-4965.c
@@ -2008,7 +2008,9 @@ static void iwl4965_rx_reply_tx(struct iwl_priv *priv,
                         IWL_DEBUG_TX_REPLY(priv, "Retry scheduler reclaim scd_ssn "
                                            "%d index %d\n", scd_ssn , index);
                         freed = iwl_tx_queue_reclaim(priv, txq_id, index);
-                        iwl_free_tfds_in_queue(priv, sta_id, tid, freed);
+                        if (qc)
+                                iwl_free_tfds_in_queue(priv, sta_id,
+                                                       tid, freed);
 
                         if (priv->mac80211_registered &&
                             (iwl_queue_space(&txq->q) > txq->q.low_mark) &&
@@ -2034,14 +2036,17 @@ static void iwl4965_rx_reply_tx(struct iwl_priv *priv,
                                    tx_resp->failure_frame);
 
                 freed = iwl_tx_queue_reclaim(priv, txq_id, index);
-                iwl_free_tfds_in_queue(priv, sta_id, tid, freed);
+                if (qc && likely(sta_id != IWL_INVALID_STATION))
+                        iwl_free_tfds_in_queue(priv, sta_id, tid, freed);
+                else if (sta_id == IWL_INVALID_STATION)
+                        IWL_DEBUG_TX_REPLY(priv, "Station not known\n");
 
                 if (priv->mac80211_registered &&
                     (iwl_queue_space(&txq->q) > txq->q.low_mark))
                         iwl_wake_queue(priv, txq_id);
         }
-
-        iwl_txq_check_empty(priv, sta_id, tid, txq_id);
+        if (qc && likely(sta_id != IWL_INVALID_STATION))
+                iwl_txq_check_empty(priv, sta_id, tid, txq_id);
 
         if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
                 IWL_ERR(priv, "TODO:  Implement Tx ABORT REQUIRED!!!\n");