cfg80211/nl80211: clarify TX queue API

With the plan to change mac80211's queue API to
not map ACs to queues 1:1, it seems necessary to
clarify some APIs that act on ACs rather than on
queues to spell that out explicitly. Do this.

Also verify that the AC number given is valid.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

net/mac80211/driver-trace.h

diff --git a/net/mac80211/driver-trace.h b/net/mac80211/driver-trace.h
index 7ea544d..d1f017a 100644
--- a/net/mac80211/driver-trace.h
+++ b/net/mac80211/driver-trace.h
@@ -705,15 +705,14 @@
 TRACE_EVENT(drv_conf_tx,
 	TP_PROTO(struct ieee80211_local *local,
 		 struct ieee80211_sub_if_data *sdata,
-		 u16 queue,
-		 const struct ieee80211_tx_queue_params *params),
+		 u16 ac, const struct ieee80211_tx_queue_params *params),
 
-	TP_ARGS(local, sdata, queue, params),
+	TP_ARGS(local, sdata, ac, params),
 
 	TP_STRUCT__entry(
 		LOCAL_ENTRY
 		VIF_ENTRY
-		__field(u16, queue)
+		__field(u16, ac)
 		__field(u16, txop)
 		__field(u16, cw_min)
 		__field(u16, cw_max)
@@ -724,7 +723,7 @@
 	TP_fast_assign(
 		LOCAL_ASSIGN;
 		VIF_ASSIGN;
-		__entry->queue = queue;
+		__entry->ac = ac;
 		__entry->txop = params->txop;
 		__entry->cw_max = params->cw_max;
 		__entry->cw_min = params->cw_min;
@@ -733,8 +732,8 @@
 	),
 
 	TP_printk(
-		LOCAL_PR_FMT  VIF_PR_FMT  " queue:%d",
-		LOCAL_PR_ARG, VIF_PR_ARG, __entry->queue
+		LOCAL_PR_FMT  VIF_PR_FMT  " AC:%d",
+		LOCAL_PR_ARG, VIF_PR_ARG, __entry->ac
 	)
 );