From 1934fee67593c561ef883761bf2ddee82f908ed9 Mon Sep 17 00:00:00 2001 From: Zhang Rui Date: Thu, 19 May 2022 22:37:32 +0800 Subject: [PATCH] ACPI: video: improve PM notifer callback PM notifier callbacks should check for supported events rather than filter out the unsupported events. So that it won't break when a new event is introduced. No functional change in this patch. Signed-off-by: Zhang Rui Signed-off-by: Rafael J. Wysocki --- drivers/acpi/acpi_video.c | 31 +++++++++++++++---------------- 1 file changed, 15 insertions(+), 16 deletions(-) diff --git a/drivers/acpi/acpi_video.c b/drivers/acpi/acpi_video.c index 990ff5b..e07782b 100644 --- a/drivers/acpi/acpi_video.c +++ b/drivers/acpi/acpi_video.c @@ -1707,24 +1707,23 @@ static int acpi_video_resume(struct notifier_block *nb, int i; switch (val) { - case PM_HIBERNATION_PREPARE: - case PM_SUSPEND_PREPARE: - case PM_RESTORE_PREPARE: - return NOTIFY_DONE; - } - - video = container_of(nb, struct acpi_video_bus, pm_nb); - - dev_info(&video->device->dev, "Restoring backlight state\n"); + case PM_POST_HIBERNATION: + case PM_POST_SUSPEND: + case PM_POST_RESTORE: + video = container_of(nb, struct acpi_video_bus, pm_nb); + + dev_info(&video->device->dev, "Restoring backlight state\n"); + + for (i = 0; i < video->attached_count; i++) { + video_device = video->attached_array[i].bind_info; + if (video_device && video_device->brightness) + acpi_video_device_lcd_set_level(video_device, + video_device->brightness->curr); + } - for (i = 0; i < video->attached_count; i++) { - video_device = video->attached_array[i].bind_info; - if (video_device && video_device->brightness) - acpi_video_device_lcd_set_level(video_device, - video_device->brightness->curr); + return NOTIFY_OK; } - - return NOTIFY_OK; + return NOTIFY_DONE; } static acpi_status -- 2.7.4