mac80211: don't open-code LED manipulations

We shouldn't open-code led_trigger_blink() or led_trigger_event(),
use them instead of badly open-coding them. This also fixes the
locking, led_trigger_blink() and led_trigger_event() now use
read_lock_irqsave().

Link: https://lore.kernel.org/r/20210616212804.b19ba1c60353.I8ea1b4defd5e12fc20ef281291e602feeec336a6@changeidSigned-off-by: Johannes Berg <johannes.berg@intel.com>

net/mac80211/led.c

@@ -259,7 +259,6 @@ static void tpt_trig_timer(struct timer_list *t)
 {
 	struct tpt_led_trigger *tpt_trig = from_timer(tpt_trig, t, timer);
 	struct ieee80211_local *local = tpt_trig->local;
-	struct led_classdev *led_cdev;
 	unsigned long on, off, tpt;
 	int i;
 
@@ -283,10 +282,7 @@ static void tpt_trig_timer(struct timer_list *t)
 		}
 	}
 
-	read_lock(&local->tpt_led.leddev_list_lock);
-	list_for_each_entry(led_cdev, &local->tpt_led.led_cdevs, trig_list)
-		led_blink_set(led_cdev, &on, &off);
-	read_unlock(&local->tpt_led.leddev_list_lock);
+	led_trigger_blink(&local->tpt_led, &on, &off);
 }
 
 const char *
@@ -341,7 +337,6 @@ static void ieee80211_start_tpt_led_trig(struct ieee80211_local *local)
 static void ieee80211_stop_tpt_led_trig(struct ieee80211_local *local)
 {
 	struct tpt_led_trigger *tpt_trig = local->tpt_led_trigger;
-	struct led_classdev *led_cdev;
 
 	if (!tpt_trig->running)
 		return;
@@ -349,10 +344,7 @@ static void ieee80211_stop_tpt_led_trig(struct ieee80211_local *local)
 	tpt_trig->running = false;
 	del_timer_sync(&tpt_trig->timer);
 
-	read_lock(&local->tpt_led.leddev_list_lock);
-	list_for_each_entry(led_cdev, &local->tpt_led.led_cdevs, trig_list)
-		led_set_brightness(led_cdev, LED_OFF);
-	read_unlock(&local->tpt_led.leddev_list_lock);
+	led_trigger_event(&local->tpt_led, LED_OFF);
 }
 
 void ieee80211_mod_tpt_led_trig(struct ieee80211_local *local,