linux-kernel - Re: [PATCH 3/3] platform/x86: asus-armoury: add keyboard control firmware attributes

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Message-ID: <d81a7a8b-6199-a82f-45ab-d94e9f024435@linux.intel.com>
Date: Mon, 29 Dec 2025 12:33:44 +0200 (EET)
From: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
To: Denis Benato <denis.benato@...ux.dev>, 
    Denis Benato <benato.denis96@...il.com>
cc: Krzysztof Kozlowski <krzk@...nel.org>, LKML <linux-kernel@...r.kernel.org>, 
    platform-driver-x86@...r.kernel.org, Hans de Goede <hansg@...nel.org>, 
    Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>, 
    "Luke D . Jones" <luke@...nes.dev>, Mateusz Schyboll <dragonn@...pl>
Subject: Re: [PATCH 3/3] platform/x86: asus-armoury: add keyboard control
 firmware attributes

On Fri, 26 Dec 2025, Krzysztof Kozlowski wrote:

> On 26/12/2025 12:46, Denis Benato wrote:
> > 
> > On 12/26/25 12:06, Krzysztof Kozlowski wrote:
> >> On 25/12/2025 15:30, Denis Benato wrote:
> >>> +ASUS_ATTR_GROUP_BOOL(kbd_leds_shutdown, "kbd_leds_shutdown",
> >>> +		     "Keyboard backlight while system is shutdown");
> >>> +
> >>>  static ssize_t gpu_mux_mode_current_value_store(struct kobject *kobj,
> >>>  						struct kobj_attribute *attr,
> >>>  						const char *buf, size_t count)
> >>> @@ -867,6 +1043,35 @@ static bool has_valid_limit(const char *name, const struct power_limits *limits)
> >>>  	return limit_value > 0;
> >>>  }
> >>>  
> >>> +static struct asus_armoury_kbd_status *asus_init_kbd_state(void)
> >>> +{
> >>> +	int err;
> >>> +	u32 kbd_status;
> >>> +	struct asus_armoury_kbd_status *kbd_state __free(kfree) = NULL;
> >> This is an undesired syntax explicitly documented as one to avoid. You
> >> need here proper assignment, not NULL. Please don't use cleanup.h if you
> >> do not intend to follow it because it does not make the code simpler.
> > Hello and thank you for your feedback!
> > 
> > I have used __free here to match a previous comment from Ilpo:
> > https://lore.kernel.org/all/25bd0c90-2de0-ef66-c18d-661180b71fd4@linux.intel.com/
> > and I figured that since this is the same exact pattern as that it would have made
> > sense to use it.
> > 
> > May I ask you to elaborate further please? If there is a more effective way to take
> > advantage of cleanup.h I will very much consider it.
> 
> Just read the doc before using it. It is very, very clear what is the
> recommended syntax,

The documentation is in include/linux/cleanup.h itself (search for "NULL" 
to find the relevant part towards the end of the long comment).

And please still use __free(), we just want to avoid using its 
anti-patterns.

-- 
 i.