Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756119Ab2HGUg2 (ORCPT ); Tue, 7 Aug 2012 16:36:28 -0400 Received: from mail-ob0-f202.google.com ([209.85.214.202]:43704 "EHLO mail-ob0-f202.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752994Ab2HGUg0 (ORCPT ); Tue, 7 Aug 2012 16:36:26 -0400 From: Colin Cross To: linux-kernel@vger.kernel.org Cc: Greg KH , Henrique de Moraes Holschuh , Bryan Wu , Richard Purdie , linux-leds@vger.kernel.org, Colin Cross Subject: [PATCH v2] leds: triggers: send uevent when changing triggers Date: Tue, 7 Aug 2012 12:58:15 -0700 Message-Id: <1344369495-21943-1-git-send-email-ccross@android.com> X-Mailer: git-send-email 1.7.7.3 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1718 Lines: 52 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. A change notification will also be sent during registration of led class devices or led triggers if the default trigger of an led class device is found. Signed-off-by: Colin Cross --- 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/