leds: Add warning printks in error paths

Add warning printks if led_trigger_register_simple() fails.

Signed-off-by: Richard Purdie <rpurdie@rpsys.net>

1 files changed, 9 insertions, 2 deletions

diff --git a/drivers/leds/led-triggers.c b/drivers/leds/led-triggers.c
index 129733f2379b..b2438a03082b 100644
--- a/drivers/leds/led-triggers.c
+++ b/drivers/leds/led-triggers.c
@@ -183,13 +183,20 @@ int led_trigger_register(struct led_trigger *trigger)
 void led_trigger_register_simple(const char *name, struct led_trigger **tp)
 {
         struct led_trigger *trigger;
+        int err;
 
         trigger = kzalloc(sizeof(struct led_trigger), GFP_KERNEL);
 
         if (trigger) {
                 trigger->name = name;
-                led_trigger_register(trigger);
-        }
+                err = led_trigger_register(trigger);
+                if (err < 0)
+                        printk(KERN_WARNING "LED trigger %s failed to register"
+                                " (%d)\n", name, err);
+        } else
+                printk(KERN_WARNING "LED trigger %s failed to register"
+                        " (no memory)\n", name);
+
         *tp = trigger;
 }