From: Zhang Rui <rui.zhang@intel.com>
To: Len Brown <lenb@kernel.org>
Cc: linux-acpi <linux-acpi@vger.kernel.org>,
"Zhang, Rui" <rui.zhang@intel.com>
Subject: [PATCH] ACPI video: no warning message if "acpi_backlight=vendor" is used
Date: Mon, 13 Jul 2009 10:33:24 +0800 [thread overview]
Message-ID: <1247452404.15520.202.camel@rzhang-dt> (raw)
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(+)
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;
next reply other threads:[~2009-07-13 2:32 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-07-13 2:33 Zhang Rui [this message]
2009-12-30 6:46 ` [PATCH] ACPI video: no warning message if "acpi_backlight=vendor" is used Len Brown
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