1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/carl9170/tx.c b/drivers/net/wireless/ath/carl9170/tx.c
index 84377cf580e0..ef4ec0da6e49 100644
--- a/drivers/net/wireless/ath/carl9170/tx.c
+++ b/drivers/net/wireless/ath/carl9170/tx.c
@@ -1485,6 +1485,13 @@ void carl9170_op_tx(struct ieee80211_hw *hw,
         }
 
         if (info->flags & IEEE80211_TX_CTL_AMPDU) {
+                /* to static code analyzers and reviewers:
+                 * mac80211 guarantees that a valid "sta"
+                 * reference is present, if a frame is to
+                 * be part of an ampdu. Hence any extra
+                 * sta == NULL checks are redundant in this
+                 * special case.
+                 */
                 run = carl9170_tx_ampdu_queue(ar, sta, skb);
                 if (run)
                         carl9170_tx_ampdu(ar);