From c04c697cf1fe8f0962ccd3c2392a9b637a5307aa Mon Sep 17 00:00:00 2001 From: Matthew Garrett Date: Tue, 16 Jul 2013 17:08:16 +0000 Subject: [PATCH] ACPI / video: Always call acpi_video_init_brightness() on init We have to call acpi_video_init_brightness() even if we're not going to initialise the backlight - Thinkpads seem to use this as the trigger for enabling ACPI notifications rather than handling it in firmware. [rjw: Drop the brightness object created by acpi_video_init_brightness() if we are not going to use it.] Signed-off-by: Matthew Garrett Signed-off-by: Rafael J. Wysocki --- drivers/acpi/video.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c index 5d7075d..f236e17 100644 --- a/drivers/acpi/video.c +++ b/drivers/acpi/video.c @@ -898,6 +898,9 @@ static void acpi_video_device_find_cap(struct acpi_video_device *device) device->cap._DDC = 1; } + if (acpi_video_init_brightness(device)) + return; + if (acpi_video_backlight_support()) { struct backlight_properties props; struct pci_dev *pdev; @@ -907,9 +910,6 @@ static void acpi_video_device_find_cap(struct acpi_video_device *device) static int count = 0; char *name; - result = acpi_video_init_brightness(device); - if (result) - return; name = kasprintf(GFP_KERNEL, "acpi_video%d", count); if (!name) return; @@ -969,6 +969,11 @@ static void acpi_video_device_find_cap(struct acpi_video_device *device) if (result) printk(KERN_ERR PREFIX "Create sysfs link\n"); + } else { + /* Remove the brightness object. */ + kfree(device->brightness->levels); + kfree(device->brightness); + device->brightness = NULL; } } -- 2.7.4