ACPI / video: Fix initial level validity test

commit 9efa5e50598c5568b0678bb411b239a0b6e9a328 upstream.

When testing if the firmware's initial value is valid, we should use
the corrected level value instead of the raw value returned from
firmware.

Signed-off-by: Aaron Lu <aaron.lu@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>

diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index 5708e44376fe486174d8e351a4e77c3d96c62d83..d2e069044a0f92ad7f2e3ab0676a1f8682bff722 100644 (file)
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -836,7 +836,7 @@ acpi_video_init_brightness(struct acpi_video_device *device)
                 * or an index). Set the backlight to max_level in this case.
                 */
                for (i = 2; i < br->count; i++)
-                       if (level_old == br->levels[i])
+                       if (level == br->levels[i])
                                break;
                if (i == br->count || !level)
                        level = max_level;