linux-kernel - [PATCH] thinkpad-acpi: fix issuing duplicated key events for brightness up/down

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Date:	Tue, 24 Apr 2012 16:40:52 +0800
From:	Alex Hung <alex.hung@...onical.com>
To:	alex.hung@...onical.com, ibm-acpi@....eng.br, mjg@...hat.com,
	ibm-acpi-devel@...ts.sourceforge.net,
	platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] thinkpad-acpi: fix issuing duplicated key events for brightness up/down

The tp_features.bright_acpimode will not be set correctly for brightness
control because ACPI_VIDEO_HID will not be located in ACPI. As a result,
a duplicated key event will always be sent. acpi_video_backlight_support()
is sufficient to detect standard ACPI brightness control.

Signed-off-by: Alex Hung <alex.hung@...onical.com>
---
 drivers/platform/x86/thinkpad_acpi.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index 7b82868..7d032d5 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -3405,7 +3405,7 @@ static int __init hotkey_init(struct ibm_init_struct *iibm)
 	/* Do not issue duplicate brightness change events to
 	 * userspace. tpacpi_detect_brightness_capabilities() must have
 	 * been called before this point  */
-	if (tp_features.bright_acpimode && acpi_video_backlight_support()) {
+	if (acpi_video_backlight_support()) {
 		pr_info("This ThinkPad has standard ACPI backlight "
 			"brightness control, supported by the ACPI "
 			"video driver\n");
-- 
1.7.0.4

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