Merge tag 'platform-drivers-x86-v4.14-2' of git://git.infradead.org/linux-platform-drivers-x86

Pull x86 platform drivers fix from Darren Hart:
 "Newly discovered species of fujitsu laptops break some assumptions
  about ACPI device pairings.

  fujitsu-laptop: Don't oops when FUJ02E3 is not present"

* tag 'platform-drivers-x86-v4.14-2' of git://git.infradead.org/linux-platform-drivers-x86:
  platform/x86: fujitsu-laptop: Don't oops when FUJ02E3 is not presnt

1 files changed, 6 insertions, 4 deletions

diff --git a/drivers/platform/x86/fujitsu-laptop.c b/drivers/platform/x86/fujitsu-laptop.c
index 85de30f93a9c..56a8195096a2 100644
--- a/drivers/platform/x86/fujitsu-laptop.c
+++ b/drivers/platform/x86/fujitsu-laptop.c
@@ -254,10 +254,12 @@ static int bl_update_status(struct backlight_device *b)
 {
         struct acpi_device *device = bl_get_data(b);
 
-        if (b->props.power == FB_BLANK_POWERDOWN)
-                call_fext_func(fext, FUNC_BACKLIGHT, 0x1, 0x4, 0x3);
-        else
-                call_fext_func(fext, FUNC_BACKLIGHT, 0x1, 0x4, 0x0);
+        if (fext) {
+                if (b->props.power == FB_BLANK_POWERDOWN)
+                        call_fext_func(fext, FUNC_BACKLIGHT, 0x1, 0x4, 0x3);
+                else
+                        call_fext_func(fext, FUNC_BACKLIGHT, 0x1, 0x4, 0x0);
+        }
 
         return set_lcd_level(device, b->props.brightness);
 }