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authorRafael J. Wysocki <rjw@sisk.pl>2008-02-04 22:30:14 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-05 09:44:23 -0800
commitfa23f5cce8cda2095013afc837ccf74b352f9f7b (patch)
treebdb22c6966b9e60eb90c97086f3ceed453223f97
parenta41e3dc4060cca2599afa14fbd4c745763746ba8 (diff)
downloadop-kernel-dev-fa23f5cce8cda2095013afc837ccf74b352f9f7b.zip
op-kernel-dev-fa23f5cce8cda2095013afc837ccf74b352f9f7b.tar.gz
leds: add possibility to remove leds classdevs during suspend/resume
Make it possible to unregister a led classdev object in a safe way during a suspend/resume cycle. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Cc: Michael Buesch <mb@bu3sch.de> Cc: Pavel Machek <pavel@ucw.cz> Cc: "John W. Linville" <linville@tuxdriver.com> Cc: Alan Stern <stern@rowland.harvard.edu> Cc: Len Brown <lenb@kernel.org> Cc: Greg KH <greg@kroah.com> Cc: Kay Sievers <kay.sievers@vrfy.org> Cc: Richard Purdie <rpurdie@rpsys.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--drivers/leds/led-class.c13
-rw-r--r--include/linux/leds.h10
2 files changed, 18 insertions, 5 deletions
diff --git a/drivers/leds/led-class.c b/drivers/leds/led-class.c
index 64c66b3..4a93878 100644
--- a/drivers/leds/led-class.c
+++ b/drivers/leds/led-class.c
@@ -137,12 +137,14 @@ err_out:
EXPORT_SYMBOL_GPL(led_classdev_register);
/**
- * led_classdev_unregister - unregisters a object of led_properties class.
+ * __led_classdev_unregister - unregisters a object of led_properties class.
* @led_cdev: the led device to unregister
+ * @suspended: indicates whether system-wide suspend or resume is in progress
*
* Unregisters a previously registered via led_classdev_register object.
*/
-void led_classdev_unregister(struct led_classdev *led_cdev)
+void __led_classdev_unregister(struct led_classdev *led_cdev,
+ bool suspended)
{
device_remove_file(led_cdev->dev, &dev_attr_brightness);
#ifdef CONFIG_LEDS_TRIGGERS
@@ -153,13 +155,16 @@ void led_classdev_unregister(struct led_classdev *led_cdev)
up_write(&led_cdev->trigger_lock);
#endif
- device_unregister(led_cdev->dev);
+ if (suspended)
+ device_pm_schedule_removal(led_cdev->dev);
+ else
+ device_unregister(led_cdev->dev);
down_write(&leds_list_lock);
list_del(&led_cdev->node);
up_write(&leds_list_lock);
}
-EXPORT_SYMBOL_GPL(led_classdev_unregister);
+EXPORT_SYMBOL_GPL(__led_classdev_unregister);
static int __init leds_init(void)
{
diff --git a/include/linux/leds.h b/include/linux/leds.h
index b4130ff..00f89fd 100644
--- a/include/linux/leds.h
+++ b/include/linux/leds.h
@@ -54,7 +54,15 @@ struct led_classdev {
extern int led_classdev_register(struct device *parent,
struct led_classdev *led_cdev);
-extern void led_classdev_unregister(struct led_classdev *led_cdev);
+extern void __led_classdev_unregister(struct led_classdev *led_cdev, bool sus);
+static inline void led_classdev_unregister(struct led_classdev *lcd)
+{
+ __led_classdev_unregister(lcd, false);
+}
+static inline void led_classdev_unregister_suspended(struct led_classdev *lcd)
+{
+ __led_classdev_unregister(lcd, true);
+}
extern void led_classdev_suspend(struct led_classdev *led_cdev);
extern void led_classdev_resume(struct led_classdev *led_cdev);
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