diff options
| author | Ville Syrjälä <[email protected]> | 2017-09-18 23:00:59 +0300 |
|---|---|---|
| committer | Darren Hart (VMware) <[email protected]> | 2017-09-27 00:04:43 -0700 |
| commit | ce7c47d60bda6c7f09ccf16e978d971c8fa16ff0 (patch) | |
| tree | b3628d20cb9c266c8041f76866a562434f36eacd | |
| parent | 2bd6bf03f4c1c59381d62c61d03f6cc3fe71f66e (diff) | |
platform/x86: fujitsu-laptop: Don't oops when FUJ02E3 is not presnt
My Fujitsu-Siemens Lifebook S6120 doesn't have the FUJ02E3 device,
but it does have FUJ02B1. That means we do register the backlight
device (and it even seems to work), but the code will oops as soon
as we try to set the backlight brightness because it's trying to
call call_fext_func() with a NULL device. Let's just skip those
function calls when the FUJ02E3 device is not present.
Cc: Jonathan Woithe <[email protected]>
Cc: Andy Shevchenko <[email protected]>
Signed-off-by: Ville Syrjälä <[email protected]>
Cc: <[email protected]> # 4.13.x
Signed-off-by: Darren Hart (VMware) <[email protected]>
| -rw-r--r-- | drivers/platform/x86/fujitsu-laptop.c | 10 |
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); } |