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This will replace the fbdev notifiers that all backlight triggers currently subscribe to. Signed-off-by: Thomas Zimmermann --- drivers/leds/trigger/ledtrig-backlight.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/drivers/leds/trigger/ledtrig-backlight.c b/drivers/leds/trigger/ledtrig-backlight.c index 487577d22cfc..c1c1aa60cf07 100644 --- a/drivers/leds/trigger/ledtrig-backlight.c +++ b/drivers/leds/trigger/ledtrig-backlight.c @@ -23,8 +23,13 @@ struct bl_trig_notifier { int old_status; struct notifier_block notifier; unsigned invert; + + struct list_head entry; }; +static struct list_head ledtrig_backlight_list; +static struct mutex ledtrig_backlight_list_mutex; + static int fb_notifier_callback(struct notifier_block *p, unsigned long event, void *data) { @@ -118,6 +123,10 @@ static int bl_trig_activate(struct led_classdev *led) if (ret) dev_err(led->dev, "unable to register backlight trigger\n"); + mutex_lock(&ledtrig_backlight_list_mutex); + list_add(&n->entry, &ledtrig_backlight_list); + mutex_unlock(&ledtrig_backlight_list_mutex); + return 0; } @@ -125,6 +134,10 @@ static void bl_trig_deactivate(struct led_classdev *led) { struct bl_trig_notifier *n = led_get_trigger_data(led); + mutex_lock(&ledtrig_backlight_list_mutex); + list_del(&n->entry); + mutex_unlock(&ledtrig_backlight_list_mutex); + fb_unregister_client(&n->notifier); kfree(n); }