Re: [RESEND PATCH] system76-acpi: Fix brightness_set schedule while atomic

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Aaron, this patch is for our DKMS driver. It also needs to be applied upstream.

-- 
  Jeremy Soller
  System76
  Principal Engineer
  jeremy@xxxxxxxxxxxx

On Thu, Jul 9, 2020, at 12:54 PM, Aaron Honeycutt wrote:
> Andy,
> 
> These changes have already been applied in this commit:
> 
> https://github.com/pop-os/system76-acpi-dkms/commit/54ac52e611b60adc50e5f977e908c5547021e4a4
> 
> Aaron Honeycutt
> System76, Inc.
> Happiness Engineer
> 720-226-9269 x602
> aaron@xxxxxxxxxxxx
> 
> On Thu, Jul 9, 2020, at 12:50 PM, Andy Shevchenko wrote:
> > On Tue, Jun 23, 2020 at 5:44 PM Nick Shipp <git@xxxxxxxxxx> wrote:
> > >
> > > And here's a fix for my email client and bad copy-paste, sorry about that noise.
> > >
> > > `system76_set' was set as an LED `brightness_set' callback, but it calls
> > > `acpi_evaluate_object' which is not atomic-safe. Switched to the
> > > `brightness_set_blocking' LED callback instead.
> > >
> > > Signed-off-by: Nick Shipp <git@xxxxxxxxxx>
> > 
> > This patch is mangled and can not be applied.
> > 
> > > ---
> > >  drivers/platform/x86/system76_acpi.c | 12 ++++++------
> > >  1 file changed, 6 insertions(+), 6 deletions(-)
> > >
> > > diff --git a/drivers/platform/x86/system76_acpi.c
> > > b/drivers/platform/x86/system76_acpi.c
> > > index 4f6e4c342382..c14fd22ba196 100644
> > > --- a/drivers/platform/x86/system76_acpi.c
> > > +++ b/drivers/platform/x86/system76_acpi.c
> > > @@ -103,12 +103,12 @@ static enum led_brightness ap_led_get(struct
> > > led_classdev *led)
> > >  }
> > >
> > >  // Set the airplane mode LED brightness
> > > -static void ap_led_set(struct led_classdev *led, enum led_brightness value)
> > > +static int ap_led_set(struct led_classdev *led, enum led_brightness value)
> > >  {
> > >         struct system76_data *data;
> > >
> > >         data = container_of(led, struct system76_data, ap_led);
> > > - system76_set(data, "SAPL", value == LED_OFF ? 0 : 1);
> > > + return system76_set(data, "SAPL", value == LED_OFF ? 0 : 1);
> > >  }
> > >
> > >  // Get the last set keyboard LED brightness
> > > @@ -121,13 +121,13 @@ static enum led_brightness kb_led_get(struct
> > > led_classdev *led)
> > >  }
> > >
> > >  // Set the keyboard LED brightness
> > > -static void kb_led_set(struct led_classdev *led, enum led_brightness value)
> > > +static int kb_led_set(struct led_classdev *led, enum led_brightness value)
> > >  {
> > >         struct system76_data *data;
> > >
> > >         data = container_of(led, struct system76_data, kb_led);
> > >         data->kb_brightness = value;
> > > - system76_set(data, "SKBL", (int)data->kb_brightness);
> > > + return system76_set(data, "SKBL", (int)data->kb_brightness);
> > >  }
> > >
> > >  // Get the last set keyboard LED color
> > > @@ -313,7 +313,7 @@ static int system76_add(struct acpi_device *acpi_dev)
> > >         data->ap_led.name = "system76_acpi::airplane";
> > >         data->ap_led.flags = LED_CORE_SUSPENDRESUME;
> > >         data->ap_led.brightness_get = ap_led_get;
> > > - data->ap_led.brightness_set = ap_led_set;
> > > + data->ap_led.brightness_set_blocking = ap_led_set;
> > >         data->ap_led.max_brightness = 1;
> > >         data->ap_led.default_trigger = "rfkill-none";
> > >         err = devm_led_classdev_register(&acpi_dev->dev, &data->ap_led);
> > > @@ -323,7 +323,7 @@ static int system76_add(struct acpi_device *acpi_dev)
> > >         data->kb_led.name = "system76_acpi::kbd_backlight";
> > >         data->kb_led.flags = LED_BRIGHT_HW_CHANGED | LED_CORE_SUSPENDRESUME;
> > >         data->kb_led.brightness_get = kb_led_get;
> > > - data->kb_led.brightness_set = kb_led_set;
> > > + data->kb_led.brightness_set_blocking = kb_led_set;
> > >         if (acpi_has_method(acpi_device_handle(data->acpi_dev), "SKBC")) {
> > >                 data->kb_led.max_brightness = 255;
> > >                 data->kb_toggle_brightness = 72;
> > > --
> > > 2.27.0
> > 
> > 
> > 
> > -- 
> > With Best Regards,
> > Andy Shevchenko
> >
>



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