Re: [PATCH 1/1] platform/x86: hp-wmi: fix platform profile issues on generic HP laptops

Hello, thank you for work! This patch resolves kernel 
errors (platform_profile: Failed to get profile for handler hp-wmi) in 
the dmesg log on my system (HP OmniBook X Flip) during power profile 
switching.

Best regards,


Milan Oravec

CIKT UKF Nitra
Mobil/Signal: +421907670270
email: [email protected]

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On 6/20/26 00:09, Marco Scardovi wrote:
> On generic (non-Omen/non-Victus) HP laptops supported by the
> hp-wmi driver, the platform_profile sysfs operations could fail,
> leading to 'platform_profile: Failed to get profile for handler hp-wmi'
> errors and preventing userspace power profile management from working
> correctly.
>
> The driver was blindly registering all 4 profiles (quiet, cool,
> balanced, performance) without checking which ones were actually
> supported by the BIOS. Furthermore, when userspace switched profiles,
> hp_wmi_platform_profile_get() was called, which queried the BIOS
> using thermal_profile_get(). If the BIOS query returned an error or
> returned a value not in the recognized cases, the get call failed,
> throwing an error.
>
> Fix this by:
> 1. Dynamically probing which thermal profiles are supported by the BIOS
>     during driver registration by temporarily setting each profile and
>     checking the return code, then restoring the original profile.
> 2. Initializing and updating active_platform_profile to cache the
>     last set/boot profile.
> 3. Falling back to the cached active_platform_profile in
>     hp_wmi_platform_profile_get() if the BIOS query fails or returns
>     an invalid/unmapped value, rather than returning an error.
>
> Closes: https://bugzilla.kernel.org/show_bug.cgi?id=220008
> Closes: https://bugzilla.kernel.org/show_bug.cgi?id=221569
> Closes: https://lore.kernel.org/platform-driver-x86/[email protected]/
> Fixes: 4296f679ca50 ("platform/x86: hp-wmi: add platform profile support")
> Assisted-by: Antigravity:gemini-3.5-flash
> Signed-off-by: Marco Scardovi <[email protected]>
> ---
>   drivers/platform/x86/hp/hp-wmi.c | 53 +++++++++++++++++++++++++++++---
>   1 file changed, 48 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/platform/x86/hp/hp-wmi.c b/drivers/platform/x86/hp/hp-wmi.c
> index 8ba286ed8721..93df269445eb 100644
> --- a/drivers/platform/x86/hp/hp-wmi.c
> +++ b/drivers/platform/x86/hp/hp-wmi.c
> @@ -1662,8 +1662,11 @@ static int hp_wmi_platform_profile_get(struct device *dev,
>   	int tp;
>   
>   	tp = thermal_profile_get();
> -	if (tp < 0)
> -		return tp;
> +	if (tp < 0) {
> +		guard(mutex)(&active_platform_profile_lock);
> +		*profile = active_platform_profile;
> +		return 0;
> +	}
>   
>   	switch (tp) {
>   	case HP_THERMAL_PROFILE_PERFORMANCE:
> @@ -1679,7 +1682,9 @@ static int hp_wmi_platform_profile_get(struct device *dev,
>   		*profile = PLATFORM_PROFILE_QUIET;
>   		break;
>   	default:
> -		return -EINVAL;
> +		guard(mutex)(&active_platform_profile_lock);
> +		*profile = active_platform_profile;
> +		break;
>   	}
>   
>   	return 0;
> @@ -1707,10 +1712,14 @@ static int hp_wmi_platform_profile_set(struct device *dev,
>   		return -EOPNOTSUPP;
>   	}
>   
> +	guard(mutex)(&active_platform_profile_lock);
> +
>   	err = thermal_profile_set(tp);
>   	if (err)
>   		return err;
>   
> +	active_platform_profile = profile;
> +
>   	return 0;
>   }
>   
> @@ -2017,8 +2026,23 @@ static int hp_wmi_platform_profile_probe(void *drvdata, unsigned long *choices)
>   		/* Adding an equivalent to HP Omen software ECO mode: */
>   		set_bit(PLATFORM_PROFILE_LOW_POWER, choices);
>   	} else {
> -		set_bit(PLATFORM_PROFILE_QUIET, choices);
> -		set_bit(PLATFORM_PROFILE_COOL, choices);
> +		int current_tp = thermal_profile_get();
> +
> +		if (current_tp < 0)
> +			return current_tp;
> +
> +		if (thermal_profile_set(HP_THERMAL_PROFILE_QUIET) == 0)
> +			set_bit(PLATFORM_PROFILE_QUIET, choices);
> +		if (thermal_profile_set(HP_THERMAL_PROFILE_COOL) == 0)
> +			set_bit(PLATFORM_PROFILE_COOL, choices);
> +		if (thermal_profile_set(HP_THERMAL_PROFILE_DEFAULT) == 0)
> +			set_bit(PLATFORM_PROFILE_BALANCED, choices);
> +		if (thermal_profile_set(HP_THERMAL_PROFILE_PERFORMANCE) == 0)
> +			set_bit(PLATFORM_PROFILE_PERFORMANCE, choices);
> +
> +		/* Restore the original thermal profile */
> +		thermal_profile_set(current_tp);
> +		return 0;
>   	}
>   
>   	set_bit(PLATFORM_PROFILE_BALANCED, choices);
> @@ -2263,6 +2287,25 @@ static int thermal_profile_setup(struct platform_device *device)
>   		if (err)
>   			return err;
>   
> +		/* Initialize active_platform_profile */
> +		switch (tp) {
> +		case HP_THERMAL_PROFILE_PERFORMANCE:
> +			active_platform_profile = PLATFORM_PROFILE_PERFORMANCE;
> +			break;
> +		case HP_THERMAL_PROFILE_DEFAULT:
> +			active_platform_profile = PLATFORM_PROFILE_BALANCED;
> +			break;
> +		case HP_THERMAL_PROFILE_COOL:
> +			active_platform_profile = PLATFORM_PROFILE_COOL;
> +			break;
> +		case HP_THERMAL_PROFILE_QUIET:
> +			active_platform_profile = PLATFORM_PROFILE_QUIET;
> +			break;
> +		default:
> +			active_platform_profile = PLATFORM_PROFILE_BALANCED;
> +			break;
> +		}
> +
>   		ops = &hp_wmi_platform_profile_ops;
>   	}
>