linux-kernel - [PATCH] acpi: add missing win8 OSI comment to blacklist

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Date:	Sun,  6 Oct 2013 20:59:55 -0500
From:	Felipe Contreras <felipe.contreras@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	linux-acpi@...r.kernel.org, "Rafael J. Wysocki" <rjw@...k.pl>,
	Matthew Garrett <mjg59@...f.ucam.org>,
	Felipe Contreras <felipe.contreras@...il.com>
Subject: [PATCH] acpi: add missing win8 OSI comment to blacklist

In my original patch[1] I wrote a comment describing the reason for
disabling Windows 2012 OSI mode for a group of machines, however, due to
unknown reasons (probably a conflict resolution mismatch), the comment
was dropped in 94fb982 (ACPI: blacklist win8 OSI for buggy laptops).

Since Matthew Garrett is making a big deal out of the lack of comments
in a separate patch[2], it might make sense to re-introduce the missing
comment so that other patch is not blocked and users don't suffer.

[1] http://article.gmane.org/gmane.linux.acpi.devel/63427
[2] http://thread.gmane.org/gmane.linux.kernel/1572459

Signed-off-by: Felipe Contreras <felipe.contreras@...il.com>
---
 drivers/acpi/blacklist.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/acpi/blacklist.c b/drivers/acpi/blacklist.c
index 9515f18..42cccbe 100644
--- a/drivers/acpi/blacklist.c
+++ b/drivers/acpi/blacklist.c
@@ -273,6 +273,11 @@ static struct dmi_system_id acpi_osi_dmi_table[] __initdata = {
 		     DMI_MATCH(DMI_PRODUCT_NAME, "Satellite P305D"),
 		},
 	},
+
+	/*
+	 * The following machines have broken backlight support when reporting
+	 * the Windows 2012 OSI, so disable it until their support is fixed.
+	 */
 	{
 	.callback = dmi_disable_osi_win8,
 	.ident = "ASUS Zenbook Prime UX31A",
-- 
1.8.4-fc

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