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SubjectRe: [PATCH v3 1/4] platform/x86: fujitsu-laptop: register backlight device in a separate function
> Move code responsible for backlight device registration to a separate
> function in order to simplify error handling and decrease indentation.
> Simplify initialization of struct backlight_properties. Use
> KBUILD_MODNAME as device name to avoid repeating the same string literal
> throughout the module.
>
> Signed-off-by: Michał Kępień <kernel@kempniu.pl>
> ---
> drivers/platform/x86/fujitsu-laptop.c | 38 ++++++++++++++++++++---------------
> 1 file changed, 22 insertions(+), 16 deletions(-)
>
> diff --git a/drivers/platform/x86/fujitsu-laptop.c b/drivers/platform/x86/fujitsu-laptop.c
> index e12cc3504d48..185c929898d9 100644
> --- a/drivers/platform/x86/fujitsu-laptop.c
> +++ b/drivers/platform/x86/fujitsu-laptop.c
> @@ -685,6 +685,25 @@ static const struct dmi_system_id fujitsu_dmi_table[] __initconst = {
>
> /* ACPI device for LCD brightness control */
>
> +static int fujitsu_backlight_register(void)
> +{
> + struct backlight_properties props = {
> + .brightness = fujitsu_bl->brightness_level,
> + .max_brightness = fujitsu_bl->max_brightness - 1,
> + .type = BACKLIGHT_PLATFORM
> + };
> + struct backlight_device *bd;
> +
> + bd = backlight_device_register(KBUILD_MODNAME, NULL, NULL,
> + &fujitsu_bl_ops, &props);

I have only just now noticed that this effectively breaks userspace
interface as KBUILD_MODNAME is "fujitsu_laptop" while the previously
used device name was "fujitsu-laptop" (underscore vs. hyphen).

Jonathan, as this series is already long overdue, I suggest the
following course of action: please review these patches anyway and if
you find no other issues, please provide your Reviewed-by etc. as you
normally would. Once you do that, I will post v4 which will use
"fujitsu-laptop" for backlight device name and will contain your v3
review tags. Does that sound reasonable?

--
Best regards,
Michał Kępień

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