rfkill: Register LED triggers before registering switch

Registering the switch triggers a LED event, so we must register
LED triggers before the switch.
This has a potential to fix a crash, depending on how the device
driver initializes the rfkill data structure.

Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

net/rfkill/rfkill.c

diff --git a/net/rfkill/rfkill.c b/net/rfkill/rfkill.c
index 51d151c..c6a9412 100644
--- a/net/rfkill/rfkill.c
+++ b/net/rfkill/rfkill.c
@@ -388,19 +388,20 @@
 	if (!rfkill->toggle_radio)
 		return -EINVAL;
 
+	snprintf(dev->bus_id, sizeof(dev->bus_id),
+		 "rfkill%ld", (long)atomic_inc_return(&rfkill_no) - 1);
+
+	rfkill_led_trigger_register(rfkill);
+
 	error = rfkill_add_switch(rfkill);
 	if (error)
 		return error;
 
-	snprintf(dev->bus_id, sizeof(dev->bus_id),
-		 "rfkill%ld", (long)atomic_inc_return(&rfkill_no) - 1);
-
 	error = device_add(dev);
 	if (error) {
 		rfkill_remove_switch(rfkill);
 		return error;
 	}
-	rfkill_led_trigger_register(rfkill);
 
 	return 0;
 }
@@ -416,9 +417,9 @@
  */
 void rfkill_unregister(struct rfkill *rfkill)
 {
-	rfkill_led_trigger_unregister(rfkill);
 	device_del(&rfkill->dev);
 	rfkill_remove_switch(rfkill);
+	rfkill_led_trigger_unregister(rfkill);
 	put_device(&rfkill->dev);
 }
 EXPORT_SYMBOL(rfkill_unregister);