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Subject[084/197] iwlwifi: need check for valid qos packet before free
2.6.32-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Wey-Yi Guy <wey-yi.w.guy@intel.com>

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>

---
drivers/net/wireless/iwlwifi/iwl-4965.c | 13 +++++++++----
1 file changed, 9 insertions(+), 4 deletions(-)

--- a/drivers/net/wireless/iwlwifi/iwl-4965.c
+++ b/drivers/net/wireless/iwlwifi/iwl-4965.c
@@ -2134,7 +2134,9 @@ static void iwl4965_rx_reply_tx(struct i
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) &&
@@ -2161,14 +2163,17 @@ static void iwl4965_rx_reply_tx(struct i
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");



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