| Message ID | 20170405064910.3162-11-kernel@kempniu.pl (mailing list archive) |
|---|---|
| State | Accepted, archived |
| Delegated to: | Darren Hart |
| Headers | show |
diff --git a/drivers/platform/x86/fujitsu-laptop.c b/drivers/platform/x86/fujitsu-laptop.c index a797e7890773..f58a33d70be3 100644 --- a/drivers/platform/x86/fujitsu-laptop.c +++ b/drivers/platform/x86/fujitsu-laptop.c @@ -438,7 +438,7 @@ static int get_max_brightness(void) static int bl_get_brightness(struct backlight_device *b) { - return get_lcd_level(); + return b->props.power == FB_BLANK_POWERDOWN ? 0 : get_lcd_level(); } static int bl_update_status(struct backlight_device *b)
The comment for the get_brightness backlight device callback in include/linux/backlight.h states that it should "return the current backlight brightness (accounting for power, fb_blank etc.)". fujitsu-laptop violates that premise by simply returning the value to which ACPI function GBLL evaluates to. Make sure 0 is returned when backlight power is turned off. Signed-off-by: Michał Kępień <kernel@kempniu.pl> --- drivers/platform/x86/fujitsu-laptop.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)