leds: triggers: return error if invalid trigger name is provided via sysfs

If an invalid trigger name is provided via sysfs currently no error
is returned. Therefore it's not possible to determine whether the
trigger was set successfully.
Fix this by returning -EINVAL if no trigger is matched.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>

diff --git a/drivers/leds/led-triggers.c b/drivers/leds/led-triggers.c
index 55fa65e1ae030dc2840d7d53e74975f4c6eaf311..c92702a684cedeaad3d2932772e62cf971c98037 100644 (file)
--- a/drivers/leds/led-triggers.c
+++ b/drivers/leds/led-triggers.c
@@ -60,6 +60,8 @@ ssize_t led_trigger_store(struct device *dev, struct device_attribute *attr,
                        goto unlock;
                }
        }
+       /* we come here only if buf matches no trigger */
+       ret = -EINVAL;
        up_read(&triggers_list_lock);
 
 unlock: