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[PATCH 2/2] iwlwifi: don't update TFD free counter for invalid station

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From: Tomas Winkler <tomas.winkler@xxxxxxxxx>

This patch makes sure that station table is not accessed
with invalid station id in 4965 TX response path

Signed-off-by: Tomas Winkler <tomas.winkler@xxxxxxxxx>
Reported-by: Johannes Berg <johannes@xxxxxxxxxxxxxxxx>
Signed-off-by: Reinette Chatre <reinette.chatre@xxxxxxxxx>
---
 drivers/net/wireless/iwlwifi/iwl-4965.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/iwlwifi/iwl-4965.c b/drivers/net/wireless/iwlwifi/iwl-4965.c
index 7cf5e2c..b2d8647 100644
--- a/drivers/net/wireless/iwlwifi/iwl-4965.c
+++ b/drivers/net/wireless/iwlwifi/iwl-4965.c
@@ -2236,7 +2236,7 @@ static void iwl4965_rx_reply_tx(struct iwl_priv *priv,
 				   tx_resp->failure_frame);
 
 		freed = iwl_tx_queue_reclaim(priv, txq_id, index);
-		if (qc)
+		if (qc && likely(sta_id != IWL_INVALID_STATION))
 			priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
 
 		if (priv->mac80211_registered &&
@@ -2244,7 +2244,7 @@ static void iwl4965_rx_reply_tx(struct iwl_priv *priv,
 			ieee80211_wake_queue(priv->hw, txq_id);
 	}
 
-	if (qc)
+	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))
-- 
1.5.4.3

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