From 43b3d6e6b1c796e847dc569a6e920e4d6c33103d Mon Sep 17 00:00:00 2001
From: Zhang Rui <rui.zhang@intel.com>
Date: Wed, 18 Mar 2009 16:27:14 +0800
Subject: [PATCH] --- yaml --- r: 141915 b: refs/heads/master c:
 d80fb99fdcd56f4934f11cc44ca016463842dc8b h: refs/heads/master i:   141913:
 5a0e6f79ac98ad2dd67194cb6d154d6c61d21024   141911:
 e7d9b5d40b609d7794815d5048032d037716759f v: v3

---
 [refs]                     |  2 +-
 trunk/drivers/acpi/video.c | 12 +++++++++---
 2 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/[refs] b/[refs]
index 536bcb2eb3b7..68524278aafe 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: d32f69470c2081ffdfd82740ac19f940790f9e93
+refs/heads/master: d80fb99fdcd56f4934f11cc44ca016463842dc8b
diff --git a/trunk/drivers/acpi/video.c b/trunk/drivers/acpi/video.c
index 398b3eee37fb..dc84970ce1e9 100644
--- a/trunk/drivers/acpi/video.c
+++ b/trunk/drivers/acpi/video.c
@@ -170,6 +170,7 @@ struct acpi_video_device_cap {
 
 struct acpi_video_brightness_flags {
 	u8 _BCL_no_ac_battery_levels:1;	/* no AC/Battery levels in _BCL */
+	u8 _BCL_reversed:1;		/* _BCL package is in a reversed order*/
 };
 
 struct acpi_video_device_brightness {
@@ -744,9 +745,14 @@ acpi_video_init_brightness(struct acpi_video_device *device)
 	} else if (level_ac_battery > 2)
 		ACPI_ERROR((AE_INFO, "Too many duplicates in _BCL package\n"));
 
-	/* sort all the supported brightness levels */
-	sort(&br->levels[2], count - 2, sizeof(br->levels[2]),
-		acpi_video_cmp_level, NULL);
+	/* Check if the _BCL package is in a reversed order */
+	if (max_level == br->levels[2]) {
+		br->flags._BCL_reversed = 1;
+		sort(&br->levels[2], count - 2, sizeof(br->levels[2]),
+			acpi_video_cmp_level, NULL);
+	} else if (max_level != br->levels[count - 1])
+		ACPI_ERROR((AE_INFO,
+			    "Found unordered _BCL package\n"));
 
 	br->count = count;
 	device->brightness = br;