ath9k: Add ath9k_chanctx_stop_queues()

This can be used when the queues of a context
needs to be stopped.

Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/ath9k/channel.c b/drivers/net/wireless/ath/ath9k/channel.c
index 96da03e..bf5ecd8 100644
--- a/drivers/net/wireless/ath/ath9k/channel.c
+++ b/drivers/net/wireless/ath/ath9k/channel.c
@@ -1177,6 +1177,25 @@
 /* Queue management */
 /********************/
 
+void ath9k_chanctx_stop_queues(struct ath_softc *sc, struct ath_chanctx *ctx)
+{
+	struct ath_hw *ah = sc->sc_ah;
+	int i;
+
+	if (ctx == &sc->offchannel.chan) {
+		ieee80211_stop_queue(sc->hw,
+				     sc->hw->offchannel_tx_hw_queue);
+	} else {
+		for (i = 0; i < IEEE80211_NUM_ACS; i++)
+			ieee80211_stop_queue(sc->hw,
+					     ctx->hw_queue_base + i);
+	}
+
+	if (ah->opmode == NL80211_IFTYPE_AP)
+		ieee80211_stop_queue(sc->hw, sc->hw->queues - 2);
+}
+
+
 void ath9k_chanctx_wake_queues(struct ath_softc *sc, struct ath_chanctx *ctx)
 {
 	struct ath_hw *ah = sc->sc_ah;