ath9k: Fix inconsistency between txq->stopped and the actual queue state

Sometimes txq state(txq->stopped) can be marked as started but the actual
queue may not be started (in ATH_WIPHY_SCAN state, for example). Fix this.

Signed-off-by: Vasanthakumar Thiagarajan <vasanth@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

3 files changed, 8 insertions, 4 deletions

diff --git a/drivers/net/wireless/ath/ath9k/ath9k.h b/drivers/net/wireless/ath/ath9k/ath9k.h
index 6e486a508edb..998ae2c49ed2 100644
--- a/drivers/net/wireless/ath/ath9k/ath9k.h
+++ b/drivers/net/wireless/ath/ath9k/ath9k.h
@@ -687,7 +687,7 @@ bool ath9k_all_wiphys_idle(struct ath_softc *sc);
 void ath9k_set_wiphy_idle(struct ath_wiphy *aphy, bool idle);
 
 void ath_mac80211_stop_queue(struct ath_softc *sc, u16 skb_queue);
-void ath_mac80211_start_queue(struct ath_softc *sc, u16 skb_queue);
+bool ath_mac80211_start_queue(struct ath_softc *sc, u16 skb_queue);
 
 void ath_start_rfkill_poll(struct ath_softc *sc);
 extern void ath9k_rfkill_poll_state(struct ieee80211_hw *hw);
diff --git a/drivers/net/wireless/ath/ath9k/virtual.c b/drivers/net/wireless/ath/ath9k/virtual.c
index 89423ca23d2c..fd20241f57d8 100644
--- a/drivers/net/wireless/ath/ath9k/virtual.c
+++ b/drivers/net/wireless/ath/ath9k/virtual.c
@@ -695,16 +695,18 @@ void ath9k_set_wiphy_idle(struct ath_wiphy *aphy, bool idle)
                   idle ? "idle" : "not-idle");
 }
 /* Only bother starting a queue on an active virtual wiphy */
-void ath_mac80211_start_queue(struct ath_softc *sc, u16 skb_queue)
+bool ath_mac80211_start_queue(struct ath_softc *sc, u16 skb_queue)
 {
         struct ieee80211_hw *hw = sc->pri_wiphy->hw;
         unsigned int i;
+        bool txq_started = false;
 
         spin_lock_bh(&sc->wiphy_lock);
 
         /* Start the primary wiphy */
         if (sc->pri_wiphy->state == ATH_WIPHY_ACTIVE) {
                 ieee80211_wake_queue(hw, skb_queue);
+                txq_started = true;
                 goto unlock;
         }
 
@@ -718,11 +720,13 @@ void ath_mac80211_start_queue(struct ath_softc *sc, u16 skb_queue)
 
                 hw = aphy->hw;
                 ieee80211_wake_queue(hw, skb_queue);
+                txq_started = true;
                 break;
         }
 
 unlock:
         spin_unlock_bh(&sc->wiphy_lock);
+        return txq_started;
 }
 
 /* Go ahead and propagate information to all virtual wiphys, it won't hurt */
diff --git a/drivers/net/wireless/ath/ath9k/xmit.c b/drivers/net/wireless/ath/ath9k/xmit.c
index 0644f1e91887..21aa5bdb2592 100644
--- a/drivers/net/wireless/ath/ath9k/xmit.c
+++ b/drivers/net/wireless/ath/ath9k/xmit.c
@@ -2077,8 +2077,8 @@ static void ath_wake_mac80211_queue(struct ath_softc *sc, struct ath_txq *txq)
 
         spin_lock_bh(&txq->axq_lock);
         if (txq->stopped && sc->tx.pending_frames[qnum] < ATH_MAX_QDEPTH) {
-                ath_mac80211_start_queue(sc, qnum);
-                txq->stopped = 0;
+                if (ath_mac80211_start_queue(sc, qnum))
+                        txq->stopped = 0;
         }
         spin_unlock_bh(&txq->axq_lock);
 }