mac80211: selective throughput LED trigger active

The throughput LED trigger was always active when
the radio was enabled. In most cases that's likely
the desired behaviour, but iwlwifi requires it to
be only active when one of the virtual interfaces
is actually "connected" in some way.

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

1 files changed, 34 insertions, 5 deletions

diff --git a/net/mac80211/led.c b/net/mac80211/led.c
index 79b13090aed7..4905eb8af572 100644
--- a/net/mac80211/led.c
+++ b/net/mac80211/led.c
@@ -216,7 +216,7 @@ static void tpt_trig_timer(unsigned long data)
 }
 
 extern char *__ieee80211_create_tpt_led_trigger(
-				struct ieee80211_hw *hw,
+				struct ieee80211_hw *hw, unsigned int flags,
 				const struct ieee80211_tpt_blink *blink_table,
 				unsigned int blink_table_len)
 {
@@ -237,6 +237,7 @@ extern char *__ieee80211_create_tpt_led_trigger(
 
 	tpt_trig->blink_table = blink_table;
 	tpt_trig->blink_table_len = blink_table_len;
+	tpt_trig->want = flags;
 
 	setup_timer(&tpt_trig->timer, tpt_trig_timer, (unsigned long)local);
 
@@ -246,11 +247,11 @@ extern char *__ieee80211_create_tpt_led_trigger(
 }
 EXPORT_SYMBOL(__ieee80211_create_tpt_led_trigger);
 
-void ieee80211_start_tpt_led_trig(struct ieee80211_local *local)
+static void ieee80211_start_tpt_led_trig(struct ieee80211_local *local)
 {
 	struct tpt_led_trigger *tpt_trig = local->tpt_led_trigger;
 
-	if (!tpt_trig)
+	if (tpt_trig->running)
 		return;
 
 	/* reset traffic */
@@ -261,12 +262,12 @@ void ieee80211_start_tpt_led_trig(struct ieee80211_local *local)
 	mod_timer(&tpt_trig->timer, round_jiffies(jiffies + HZ));
 }
 
-void ieee80211_stop_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)
+	if (!tpt_trig->running)
 		return;
 
 	tpt_trig->running = false;
@@ -277,3 +278,31 @@ void ieee80211_stop_tpt_led_trig(struct ieee80211_local *local)
 		led_brightness_set(led_cdev, LED_OFF);
 	read_unlock(&tpt_trig->trig.leddev_list_lock);
 }
+
+void ieee80211_mod_tpt_led_trig(struct ieee80211_local *local,
+				unsigned int types_on, unsigned int types_off)
+{
+	struct tpt_led_trigger *tpt_trig = local->tpt_led_trigger;
+	bool allowed;
+
+	WARN_ON(types_on & types_off);
+
+	if (!tpt_trig)
+		return;
+
+	tpt_trig->active &= ~types_off;
+	tpt_trig->active |= types_on;
+
+	/*
+	 * Regardless of wanted state, we shouldn't blink when
+	 * the radio is disabled -- this can happen due to some
+	 * code ordering issues with __ieee80211_recalc_idle()
+	 * being called before the radio is started.
+	 */
+	allowed = tpt_trig->active & IEEE80211_TPT_LEDTRIG_FL_RADIO;
+
+	if (!allowed || !(tpt_trig->active & tpt_trig->want))
+		ieee80211_stop_tpt_led_trig(local);
+	else
+		ieee80211_start_tpt_led_trig(local);
+}