diff mbox

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

Message ID 1247452404.15520.202.camel@rzhang-dt (mailing list archive)
State Accepted
Delegated to: Len Brown
Headers show

Commit Message

Zhang Rui July 13, 2009, 2:33 a.m. UTC 
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>
---
 drivers/acpi/video.c |    4 ++++
 1 file changed, 4 insertions(+)



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diff mbox

Patch

Index: linux-2.6/drivers/acpi/video.c
===================================================================
--- linux-2.6.orig/drivers/acpi/video.c
+++ linux-2.6/drivers/acpi/video.c
@@ -1948,6 +1948,10 @@  acpi_video_switch_brightness(struct acpi
 	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;