Messages in this thread Patch in this message | | | From | Colin Cross <> | Subject | [PATCH] leds: triggers: send uevent when changing triggers | Date | Tue, 24 Jul 2012 17:32:50 -0700 |
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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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