mirror of https://gitee.com/openkylin/linux.git
Merge branch 'for-linus' of git://git.o-hand.com/linux-rpurdie-leds
* 'for-linus' of git://git.o-hand.com/linux-rpurdie-leds: leds: Fix locomo LED driver oops leds: Fix leds_list_lock locking issues
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commit
77717d27c2
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@ -106,9 +106,9 @@ int led_classdev_register(struct device *parent, struct led_classdev *led_cdev)
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goto err_out;
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/* add to the list of leds */
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write_lock(&leds_list_lock);
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down_write(&leds_list_lock);
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list_add_tail(&led_cdev->node, &leds_list);
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write_unlock(&leds_list_lock);
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up_write(&leds_list_lock);
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#ifdef CONFIG_LEDS_TRIGGERS
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init_rwsem(&led_cdev->trigger_lock);
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@ -155,9 +155,9 @@ void led_classdev_unregister(struct led_classdev *led_cdev)
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device_unregister(led_cdev->dev);
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write_lock(&leds_list_lock);
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down_write(&leds_list_lock);
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list_del(&led_cdev->node);
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write_unlock(&leds_list_lock);
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up_write(&leds_list_lock);
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}
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EXPORT_SYMBOL_GPL(led_classdev_unregister);
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@ -14,11 +14,11 @@
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#include <linux/kernel.h>
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#include <linux/list.h>
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#include <linux/module.h>
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#include <linux/spinlock.h>
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#include <linux/rwsem.h>
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#include <linux/leds.h>
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#include "leds.h"
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DEFINE_RWLOCK(leds_list_lock);
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DECLARE_RWSEM(leds_list_lock);
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LIST_HEAD(leds_list);
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EXPORT_SYMBOL_GPL(leds_list);
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@ -169,7 +169,7 @@ int led_trigger_register(struct led_trigger *trigger)
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up_write(&triggers_list_lock);
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/* Register with any LEDs that have this as a default trigger */
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read_lock(&leds_list_lock);
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down_read(&leds_list_lock);
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list_for_each_entry(led_cdev, &leds_list, node) {
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down_write(&led_cdev->trigger_lock);
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if (!led_cdev->trigger && led_cdev->default_trigger &&
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@ -177,7 +177,7 @@ int led_trigger_register(struct led_trigger *trigger)
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led_trigger_set(led_cdev, trigger);
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up_write(&led_cdev->trigger_lock);
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}
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read_unlock(&leds_list_lock);
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up_read(&leds_list_lock);
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return 0;
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}
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@ -212,14 +212,14 @@ void led_trigger_unregister(struct led_trigger *trigger)
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up_write(&triggers_list_lock);
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/* Remove anyone actively using this trigger */
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read_lock(&leds_list_lock);
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down_read(&leds_list_lock);
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list_for_each_entry(led_cdev, &leds_list, node) {
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down_write(&led_cdev->trigger_lock);
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if (led_cdev->trigger == trigger)
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led_trigger_set(led_cdev, NULL);
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up_write(&led_cdev->trigger_lock);
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}
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read_unlock(&leds_list_lock);
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up_read(&leds_list_lock);
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}
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void led_trigger_unregister_simple(struct led_trigger *trigger)
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@ -19,7 +19,7 @@
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static void locomoled_brightness_set(struct led_classdev *led_cdev,
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enum led_brightness value, int offset)
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{
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struct locomo_dev *locomo_dev = LOCOMO_DEV(led_cdev->dev);
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struct locomo_dev *locomo_dev = LOCOMO_DEV(led_cdev->dev->parent);
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unsigned long flags;
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local_irq_save(flags);
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@ -14,6 +14,7 @@
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#define __LEDS_H_INCLUDED
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#include <linux/device.h>
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#include <linux/rwsem.h>
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#include <linux/leds.h>
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static inline void led_set_brightness(struct led_classdev *led_cdev,
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@ -26,7 +27,7 @@ static inline void led_set_brightness(struct led_classdev *led_cdev,
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led_cdev->brightness_set(led_cdev, value);
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}
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extern rwlock_t leds_list_lock;
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extern struct rw_semaphore leds_list_lock;
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extern struct list_head leds_list;
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#ifdef CONFIG_LEDS_TRIGGERS
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