sony-laptop: brightness regression fix

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>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/misc/sony-laptop.c b/drivers/misc/sony-laptop.c
index 7bcb81002dcf..2a613d4f3bd6 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",