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Subject[PATCH] leds: triggers: send uevent when changing triggers
Date
Some triggers create sysfs files when they are enabled.  Send a uevent
"change" notification whenever the trigger is changed to allow userspace
processes such as udev to modify permissions on the new files.

Signed-off-by: Colin Cross <ccross@android.com>
---
drivers/leds/led-triggers.c | 13 +++++++++++++
1 files changed, 13 insertions(+), 0 deletions(-)

diff --git a/drivers/leds/led-triggers.c b/drivers/leds/led-triggers.c
index 46b4c76..a85ce09 100644
--- a/drivers/leds/led-triggers.c
+++ b/drivers/leds/led-triggers.c
@@ -102,6 +102,12 @@ ssize_t led_trigger_show(struct device *dev, struct device_attribute *attr,
void led_trigger_set(struct led_classdev *led_cdev, struct led_trigger *trigger)
{
unsigned long flags;
+ char *event = NULL;
+ char *envp[2];
+ const char *name;
+
+ name = trigger ? trigger->name : "none";
+ event = kasprintf(GFP_KERNEL, "TRIGGER=%s", name);

/* Remove any existing trigger */
if (led_cdev->trigger) {
@@ -122,6 +128,13 @@ void led_trigger_set(struct led_classdev *led_cdev, struct led_trigger *trigger)
if (trigger->activate)
trigger->activate(led_cdev);
}
+
+ if (event) {
+ envp[0] = event;
+ envp[1] = NULL;
+ kobject_uevent_env(&led_cdev->dev->kobj, KOBJ_CHANGE, envp);
+ kfree(event);
+ }
}
EXPORT_SYMBOL_GPL(led_trigger_set);

--
1.7.7.3


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