diff options
| -rw-r--r-- | drivers/leds/led-triggers.c | 26 | ||||
| -rw-r--r-- | include/linux/leds.h | 10 |
2 files changed, 30 insertions, 6 deletions
diff --git a/drivers/leds/led-triggers.c b/drivers/leds/led-triggers.c index 0836bf7631ea..91da90cfb11d 100644 --- a/drivers/leds/led-triggers.c +++ b/drivers/leds/led-triggers.c @@ -27,6 +27,12 @@ LIST_HEAD(trigger_list); /* Used by LED Class */ +static inline bool +trigger_relevant(struct led_classdev *led_cdev, struct led_trigger *trig) +{ + return !trig->trigger_type || trig->trigger_type == led_cdev->trigger_type; +} + ssize_t led_trigger_write(struct file *filp, struct kobject *kobj, struct bin_attribute *bin_attr, char *buf, loff_t pos, size_t count) @@ -50,7 +56,7 @@ ssize_t led_trigger_write(struct file *filp, struct kobject *kobj, down_read(&triggers_list_lock); list_for_each_entry(trig, &trigger_list, next_trig) { - if (sysfs_streq(buf, trig->name)) { + if (sysfs_streq(buf, trig->name) && trigger_relevant(led_cdev, trig)) { down_write(&led_cdev->trigger_lock); led_trigger_set(led_cdev, trig); up_write(&led_cdev->trigger_lock); @@ -93,8 +99,12 @@ static int led_trigger_format(char *buf, size_t size, led_cdev->trigger ? "none" : "[none]"); list_for_each_entry(trig, &trigger_list, next_trig) { - bool hit = led_cdev->trigger && - !strcmp(led_cdev->trigger->name, trig->name); + bool hit; + + if (!trigger_relevant(led_cdev, trig)) + continue; + + hit = led_cdev->trigger && !strcmp(led_cdev->trigger->name, trig->name); len += led_trigger_snprintf(buf + len, size - len, " %s%s%s", hit ? "[" : "", @@ -243,7 +253,8 @@ void led_trigger_set_default(struct led_classdev *led_cdev) down_read(&triggers_list_lock); down_write(&led_cdev->trigger_lock); list_for_each_entry(trig, &trigger_list, next_trig) { - if (!strcmp(led_cdev->default_trigger, trig->name)) { + if (!strcmp(led_cdev->default_trigger, trig->name) && + trigger_relevant(led_cdev, trig)) { led_cdev->flags |= LED_INIT_DEFAULT_TRIGGER; led_trigger_set(led_cdev, trig); break; @@ -280,7 +291,9 @@ int led_trigger_register(struct led_trigger *trig) down_write(&triggers_list_lock); /* Make sure the trigger's name isn't already in use */ list_for_each_entry(_trig, &trigger_list, next_trig) { - if (!strcmp(_trig->name, trig->name)) { + if (!strcmp(_trig->name, trig->name) && + (trig->trigger_type == _trig->trigger_type || + !trig->trigger_type || !_trig->trigger_type)) { up_write(&triggers_list_lock); return -EEXIST; } @@ -294,7 +307,8 @@ int led_trigger_register(struct led_trigger *trig) list_for_each_entry(led_cdev, &leds_list, node) { down_write(&led_cdev->trigger_lock); if (!led_cdev->trigger && led_cdev->default_trigger && - !strcmp(led_cdev->default_trigger, trig->name)) { + !strcmp(led_cdev->default_trigger, trig->name) && + trigger_relevant(led_cdev, trig)) { led_cdev->flags |= LED_INIT_DEFAULT_TRIGGER; led_trigger_set(led_cdev, trig); } diff --git a/include/linux/leds.h b/include/linux/leds.h index 2451962d1ec5..6a8d6409c993 100644 --- a/include/linux/leds.h +++ b/include/linux/leds.h @@ -57,6 +57,10 @@ struct led_init_data { bool devname_mandatory; }; +struct led_hw_trigger_type { + int dummy; +}; + struct led_classdev { const char *name; enum led_brightness brightness; @@ -141,6 +145,9 @@ struct led_classdev { void *trigger_data; /* true if activated - deactivate routine uses it to do cleanup */ bool activated; + + /* LEDs that have private triggers have this set */ + struct led_hw_trigger_type *trigger_type; #endif #ifdef CONFIG_LEDS_BRIGHTNESS_HW_CHANGED @@ -345,6 +352,9 @@ struct led_trigger { int (*activate)(struct led_classdev *led_cdev); void (*deactivate)(struct led_classdev *led_cdev); + /* LED-private triggers have this set */ + struct led_hw_trigger_type *trigger_type; + /* LEDs under control by this trigger (for simple triggers) */ rwlock_t leddev_list_lock; struct list_head led_cdevs; |