ACPI: ibm-acpi: fix initial status of backlight device

The brightness class core does not update the initial status of the
device's brightness at register time.  Do it by ourselves.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Acked-by: Richard Purdie <rpurdie@rpsys.net>

1 files changed, 9 insertions, 1 deletions

diff --git a/drivers/acpi/ibm_acpi.c b/drivers/acpi/ibm_acpi.c
index 4cc534e36e81..7c1b418676b9 100644
--- a/drivers/acpi/ibm_acpi.c
+++ b/drivers/acpi/ibm_acpi.c
@@ -1711,6 +1711,12 @@ static struct backlight_ops ibm_backlight_data = {
 
 static int brightness_init(void)
 {
+        int b;
+
+        b = brightness_get(NULL);
+        if (b < 0)
+                return b;
+
         ibm_backlight_device = backlight_device_register("ibm", NULL, NULL,
                                                          &ibm_backlight_data);
         if (IS_ERR(ibm_backlight_device)) {
@@ -1718,7 +1724,9 @@ static int brightness_init(void)
                 return PTR_ERR(ibm_backlight_device);
         }
 
-        ibm_backlight_device->props.max_brightness = 7;
+        ibm_backlight_device->props.max_brightness = 7;
+        ibm_backlight_device->props.brightness = b;
+        backlight_update_status(ibm_backlight_device);
 
         return 0;
 }