[9/9] rfkill: Notify userspace of airplane-mode state changes

Commit Message

João Paulo Rechi Vita Feb. 8, 2016, 3:41 p.m. UTC

Signed-off-by: João Paulo Rechi Vita <[e-mail]>
---
 Documentation/rfkill.txt |  3 +++
 net/rfkill/core.c        | 13 +++++++++++++
 2 files changed, 16 insertions(+)

Patch

diff --git a/Documentation/rfkill.txt b/Documentation/rfkill.txt
index aa6e014..5248812 100644
--- a/Documentation/rfkill.txt
+++ b/Documentation/rfkill.txt
@@ -133,5 +133,8 @@  it available for other applications to take control. Changes to the
 airplane-mode indicator state can be made using RFKILL_OP_AIRPLANE_MODE_CHANGE,
 passing the new value in the 'soft' field of 'struct rfkill_event'.
 
+This same API is also used to provide userspace with notifications of changes
+to airplane-mode indicator state.
+
 
 For further details consult Documentation/ABI/stable/sysfs-class-rfkill.
diff --git a/net/rfkill/core.c b/net/rfkill/core.c
index 8067701..abbb8f7 100644
--- a/net/rfkill/core.c
+++ b/net/rfkill/core.c
@@ -131,7 +131,20 @@  static struct led_trigger rfkill_apm_led_trigger;
 
 static void rfkill_apm_led_trigger_event(bool state)
 {
+	struct rfkill_data *data;
+	struct rfkill_int_event *ev;
+
 	led_trigger_event(&rfkill_apm_led_trigger, state ? LED_FULL : LED_OFF);
+
+	list_for_each_entry(data, &rfkill_fds, list) {
+		ev = kzalloc(sizeof(*ev), GFP_KERNEL);
+		if (!ev)
+			continue;
+		ev->ev.op = RFKILL_OP_AIRPLANE_MODE_CHANGE;
+		ev->ev.soft = state;
+		list_add_tail(&ev->list, &data->events);
+		wake_up_interruptible(&data->read_wait);
+	}
 }
 
 static void rfkill_apm_led_trigger_activate(struct led_classdev *led)