linux-kernel - [PATCH 161/241] ACPI video: Ignore errors after

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Date:	Thu, 13 Dec 2012 11:58:46 -0200
From:	Herton Ronaldo Krzesinski <herton.krzesinski@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Igor Murzov <e-mail@...e.by>, Zhang Rui <rui.zhang@...el.com>,
	Herton Ronaldo Krzesinski <herton.krzesinski@...onical.com>
Subject: [PATCH 161/241] ACPI video: Ignore errors after _DOD evaluation.

3.5.7.2 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Igor Murzov <e-mail@...e.by>

commit fba4e087361605d1eed63343bb08811f097c83ee upstream.

There are systems where video module known to work fine regardless
of broken _DOD and ignoring returned value here doesn't cause
any issues later. This should fix brightness controls on some laptops.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=47861

Signed-off-by: Igor Murzov <e-mail@...e.by>
Reviewed-by: Sergey V <sftp.mtuci@...il.com>
Signed-off-by: Zhang Rui <rui.zhang@...el.com>
Signed-off-by: Herton Ronaldo Krzesinski <herton.krzesinski@...onical.com>
---
 drivers/acpi/video.c |   11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index 1e0a9e1..9fe2659 100644
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -1345,12 +1345,15 @@ static int
 acpi_video_bus_get_devices(struct acpi_video_bus *video,
 			   struct acpi_device *device)
 {
-	int status;
+	int status = 0;
 	struct acpi_device *dev;
 
-	status = acpi_video_device_enumerate(video);
-	if (status)
-		return status;
+	/*
+	 * There are systems where video module known to work fine regardless
+	 * of broken _DOD and ignoring returned value here doesn't cause
+	 * any issues later.
+	 */
+	acpi_video_device_enumerate(video);
 
 	list_for_each_entry(dev, &device->children, node) {
 
-- 
1.7.9.5

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