wifi: mac80211: make sta airtime deficit field s32 instead of s64

32 bit is more than enough range for the airtime deficit
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Acked-by: Toke Høiland-Jørgensen <toke@toke.dk>
Link: https://lore.kernel.org/r/20220625212411.36675-2-nbd@nbd.nameSigned-off-by: Johannes Berg <johannes.berg@intel.com>

net/mac80211/debugfs_sta.c

@@ -202,7 +202,7 @@ static ssize_t sta_airtime_read(struct file *file, char __user *userbuf,
 	size_t bufsz = 400;
 	char *buf = kzalloc(bufsz, GFP_KERNEL), *p = buf;
 	u64 rx_airtime = 0, tx_airtime = 0;
-	s64 deficit[IEEE80211_NUM_ACS];
+	s32 deficit[IEEE80211_NUM_ACS];
 	ssize_t rv;
 	int ac;
 
@@ -219,7 +219,7 @@ static ssize_t sta_airtime_read(struct file *file, char __user *userbuf,
 
 	p += scnprintf(p, bufsz + buf - p,
 		"RX: %llu us\nTX: %llu us\nWeight: %u\n"
-		"Deficit: VO: %lld us VI: %lld us BE: %lld us BK: %lld us\n",
+		"Deficit: VO: %d us VI: %d us BE: %d us BK: %d us\n",
 		rx_airtime, tx_airtime, sta->airtime_weight,
 		deficit[0], deficit[1], deficit[2], deficit[3]);
 

net/mac80211/sta_info.h

@@ -138,7 +138,7 @@ enum ieee80211_agg_stop_reason {
 struct airtime_info {
 	u64 rx_airtime;
 	u64 tx_airtime;
-	s64 deficit;
+	s32 deficit;
 	atomic_t aql_tx_pending; /* Estimated airtime for frames pending */
 	u32 aql_limit_low;
 	u32 aql_limit_high;

net/mac80211/tx.c

@@ -3830,7 +3830,7 @@ struct ieee80211_txq *ieee80211_next_txq(struct ieee80211_hw *hw, u8 ac)
 		struct sta_info *sta = container_of(txqi->txq.sta,
 						    struct sta_info, sta);
 		bool aql_check = ieee80211_txq_airtime_check(hw, &txqi->txq);
-		s64 deficit = sta->airtime[txqi->txq.ac].deficit;
+		s32 deficit = sta->airtime[txqi->txq.ac].deficit;
 
 		if (aql_check)
 			found_eligible_txq = true;