From: Colin Cross <ccross@android.com>
To: linux-kernel@vger.kernel.org
Cc: Greg KH <gregkh@linuxfoundation.org>,
Henrique de Moraes Holschuh <hmh@hmh.eng.br>,
Colin Cross <ccross@android.com>,
Bryan Wu <bryan.wu@canonical.com>,
Richard Purdie <rpurdie@rpsys.net>,
linux-leds@vger.kernel.org
Subject: [PATCH] leds: triggers: send uevent when changing triggers
Date: Tue, 24 Jul 2012 17:32:50 -0700 [thread overview]
Message-ID: <1343176370-5856-1-git-send-email-ccross@android.com> (raw)
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
next reply other threads:[~2012-07-25 0:32 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-25 0:32 Colin Cross [this message]
2012-07-25 6:11 ` [PATCH] leds: triggers: send uevent when changing triggers Bryan Wu
2012-07-25 14:36 ` Greg KH
2012-07-25 18:54 ` Colin Cross
2012-07-26 3:29 ` Bryan Wu
2012-07-26 3:59 ` Greg KH
2012-07-26 5:03 ` Bryan Wu
2012-07-26 16:51 ` Greg KH
2012-07-27 4:04 ` Bryan Wu
2012-07-31 18:28 ` Colin Cross
2012-08-07 2:57 ` Bryan Wu
2012-08-07 3:34 ` Greg KH
[not found] ` <CAK5ve-KLdwEqW6MLbusMRkaHBQkxTqOGLoVWzSmiuo2qxwtwmA@mail.gmail.com>
2012-08-07 3:43 ` Greg KH
2012-08-07 14:36 ` Henrique de Moraes Holschuh
2012-08-07 19:44 ` Colin Cross
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