Commit 28c32e99 authored Jul 13, 2009 by Zhang Rui Committed by Len Brown Dec 30, 2009

ACPI video: no warning message if "acpi_backlight=vendor" is used

AML code always sends notifications to ACPI video device,
even if we disable the ACPI backlight control by using
boot option "acpi_backlight=vendor".

In this case we should not print any warning message.
http://bugzilla.kernel.org/show_bug.cgi?id=13671#c14



Sigend-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

parent 6b7b2849

drivers/acpi/video.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -1979,6 +1979,10 @@ acpi_video_switch_brightness(struct acpi_video_device *device, int event)
		unsigned long long level_current, level_next;
		int result = -EINVAL;

		/* no warning message if acpi_backlight=vendor is used */
		if (!acpi_video_backlight_support())
		return 0;

		if (!device->brightness)
		goto out;