From fa23f5cce8cda2095013afc837ccf74b352f9f7b Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Mon, 4 Feb 2008 22:30:14 -0800 Subject: [PATCH] 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 Cc: Michael Buesch Cc: Pavel Machek Cc: "John W. Linville" Cc: Alan Stern Cc: Len Brown Cc: Greg KH Cc: Kay Sievers Cc: Richard Purdie Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/leds/led-class.c | 13 +++++++++---- include/linux/leds.h | 10 +++++++++- 2 files changed, 18 insertions(+), 5 deletions(-) diff --git a/drivers/leds/led-class.c b/drivers/leds/led-class.c index 64c66b3769c..4a938780dfc 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 b4130ff58d0..00f89fd6c52 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); -- 2.41.1