carl9170: Implement tx_frames_pending mac80211 callback function

Implementing this callback function will cause mac80211 refrain from
going to powersave state when there are still untransmitted TX frames
in the queues.

Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/carl9170/main.c b/drivers/net/wireless/ath/carl9170/main.c
index d2b9f1256bc8..a61cf6781d5e 100644
--- a/drivers/net/wireless/ath/carl9170/main.c
+++ b/drivers/net/wireless/ath/carl9170/main.c
@@ -1484,6 +1484,13 @@ static void carl9170_op_sta_notify(struct ieee80211_hw *hw,
         }
 }
 
+static bool carl9170_tx_frames_pending(struct ieee80211_hw *hw)
+{
+        struct ar9170 *ar = hw->priv;
+
+        return !!atomic_read(&ar->tx_total_queued);
+}
+
 static const struct ieee80211_ops carl9170_ops = {
         .start                  = carl9170_op_start,
         .stop                   = carl9170_op_stop,
@@ -1504,6 +1511,7 @@ static const struct ieee80211_ops carl9170_ops = {
         .get_survey             = carl9170_op_get_survey,
         .get_stats              = carl9170_op_get_stats,
         .ampdu_action           = carl9170_op_ampdu_action,
+        .tx_frames_pending      = carl9170_tx_frames_pending,
 };
 
 void *carl9170_alloc(size_t priv_size)