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@xxxxxxxxxxxxxxxxxxxx>
---
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",
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