ath9k: Fix channel context events

Check if channel context usage is enabled before
calling ath_chanctx_event() from various parts of the
driver. Also, make sure that ath_chanctx_event() is
compiled only when CONFIG_ATH9K_CHANNEL_CONTEXT is
enabled.

Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ath9k/beacon.c

@@ -427,9 +427,11 @@ void ath9k_beacon_tasklet(unsigned long data)
 
 	/* EDMA devices check that in the tx completion function. */
 	if (!edma) {
-		if (sc->sched.beacon_pending)
-			ath_chanctx_event(sc, NULL,
-					  ATH_CHANCTX_EVENT_BEACON_SENT);
+		if (ath9k_is_chanctx_enabled()) {
+			if (sc->sched.beacon_pending)
+				ath_chanctx_event(sc, NULL,
+						  ATH_CHANCTX_EVENT_BEACON_SENT);
+		}
 
 		if (ath9k_csa_is_finished(sc, vif))
 			return;
@@ -438,7 +440,10 @@ void ath9k_beacon_tasklet(unsigned long data)
 	if (!vif || !vif->bss_conf.enable_beacon)
 		return;
 
-	ath_chanctx_event(sc, vif, ATH_CHANCTX_EVENT_BEACON_PREPARE);
+	if (ath9k_is_chanctx_enabled()) {
+		ath_chanctx_event(sc, vif, ATH_CHANCTX_EVENT_BEACON_PREPARE);
+	}
+
 	bf = ath9k_beacon_generate(sc->hw, vif);
 
 	if (sc->beacon.bmisscnt != 0) {