From: Alessandro Guido <ag@alessandroguido.name>
To: len.brown@intel.com
Cc: trenn@suse.de, linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org
Subject: [sony-laptop] Fix regression caused by "sony-laptop: fingers off backlight if video.ko is serving this functionality"
Date: Wed, 12 Nov 2008 23:03:28 +0100 [thread overview]
Message-ID: <200811122303.29372.ag@alessandroguido.name> (raw)
After commit 540b8bb9c33935183ceb5bed466a42ad72b2af56:
sony-laptop: fingers off backlight if video.ko is serving this functionality
I can't set brightness on my sony laptop (nothing in /sys/class/backlight).
dmesg says "sony-laptop: Sony: Brightness ignored, must be controlled by ACPI
video driver".
The function acpi_video_backlight_support returns 0 if we should use the
vendor-specific backlight support, while non-0 if the ACPI generic should
be used. Because of this, the check introduced by the said commit appears
reversed.
Signed-off-by: Alessandro Guido <ag@alessandroguido.name>
---
diff --git a/drivers/misc/sony-laptop.c b/drivers/misc/sony-laptop.c
index 7bcb810..2a613d4 100644
--- a/drivers/misc/sony-laptop.c
+++ b/drivers/misc/sony-laptop.c
@@ -1038,7 +1038,7 @@ static int sony_nc_add(struct acpi_device *device)
goto outinput;
}
- if (!acpi_video_backlight_support()) {
+ if (acpi_video_backlight_support()) {
printk(KERN_INFO DRV_PFX "Sony: Brightness ignored, must be "
"controlled by ACPI video driver\n");
} else if (ACPI_SUCCESS(acpi_get_handle(sony_nc_acpi_handle, "GBRT",
next reply other threads:[~2008-11-12 22:03 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-11-12 22:03 Alessandro Guido [this message]
2008-11-12 22:27 ` Thomas Renninger
2008-11-13 5:56 ` Len Brown
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