linux-kernel - Re: [PATCH v2] lenovo-wmi-hotkey: Fixed a kernel error report for

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Message-ID: <277b444e-5818-47ae-bf92-f31c25538572@139.com>
Date: Tue, 8 Jul 2025 17:41:57 +0800
From: Jackie Dong <xy-jackie@....com>
To: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
Cc: hansg@...nel.org, platform-driver-x86@...r.kernel.org,
 LKML <linux-kernel@...r.kernel.org>, dongeg1@...ovo.com
Subject: Re: [PATCH v2] lenovo-wmi-hotkey: Fixed a kernel error report for

Hi Ilpo,
    Thanks for your comments, I'll update it later.

    Jackie Dong
On 7/8/25 16:07, Ilpo Järvinen wrote:
> On Tue, 8 Jul 2025, Jackie Dong wrote:
> 
> Hi,
> 
> Shortlog in Subject seems incomplete
> 
>> Not all of Lenovo non-ThinkPad devices support both mic mute LED(on F4)
>> and audio mute LED(on F1). Some of them only support one mute LED, some
> 
> Add spaces after (
> 
>> of them don't have any mute LED. Add a decision to judge this device
>> support mute LED or not. Without this decision, not support both of mic
>> mute LED and audio mute LED Lenovo non-ThinkPad brand devices (including
>> Ideapad/Yoga/Xiaoxin/Gaming/ThinkBook, etc.) will report a failed message
>> with error -5.
>>
>> Signed-off-by: Jackie Dong <xy-jackie@....com>
>> Suggested-by: Hans de Goede <hansg@...nel.org>
>>
>> ---
>> Changes in v2:
>>   - Add warning message and then return 0 if the device support mute LED
>>     abnormaly, based on Hans suggestion and Armin previous patch.
>>
>>   .../x86/lenovo-wmi-hotkey-utilities.c         | 30 +++++++++++++------
>>   1 file changed, 21 insertions(+), 9 deletions(-)
>>
>> diff --git a/drivers/platform/x86/lenovo-wmi-hotkey-utilities.c b/drivers/platform/x86/lenovo-wmi-hotkey-utilities.c
>> index 89153afd7015..334c12f2896d 100644
>> --- a/drivers/platform/x86/lenovo-wmi-hotkey-utilities.c
>> +++ b/drivers/platform/x86/lenovo-wmi-hotkey-utilities.c
>> @@ -122,26 +122,35 @@ static int lenovo_super_hotkey_wmi_led_init(enum mute_led_type led_type, struct
>>   		return -EIO;
>>   
>>   	union acpi_object *obj __free(kfree) = output.pointer;
>> -	if (obj && obj->type == ACPI_TYPE_INTEGER)
>> +	if (obj && obj->type == ACPI_TYPE_INTEGER) {
> 
> Could you please reverse this logic and handle errors first.
> 
>>   		led_version = obj->integer.value;
>> -	else
>> -		return -EIO;
>>   
>> -	wpriv->cdev[led_type].max_brightness = LED_ON;
>> -	wpriv->cdev[led_type].flags = LED_CORE_SUSPENDRESUME;
>> +		/*
>> +		 * Output parameters define: 0 means mute LED is not supported, Non-zero means
>> +		 * mute LED can be supported.
>> +		 */
>> +		if (led_version == 0)
>> +			return 0;
>> +	} else {
>> +		return -EIO;
>> +	}
>>   
>>   	switch (led_type) {
>>   	case MIC_MUTE:
>> -		if (led_version != WMI_LUD_SUPPORT_MICMUTE_LED_VER)
>> -			return -EIO;
>> +		if (led_version != WMI_LUD_SUPPORT_MICMUTE_LED_VER) {
>> +			pr_warn("This device MIC_MUTE LED doesn't support now.\n");
>> +			return 0;
>> +		}
>>   
>>   		wpriv->cdev[led_type].name = "platform::micmute";
>>   		wpriv->cdev[led_type].brightness_set_blocking = &lsh_wmi_micmute_led_set;
>>   		wpriv->cdev[led_type].default_trigger = "audio-micmute";
>>   		break;
>>   	case AUDIO_MUTE:
>> -		if (led_version != WMI_LUD_SUPPORT_AUDIOMUTE_LED_VER)
>> -			return -EIO;
>> +		if (led_version != WMI_LUD_SUPPORT_AUDIOMUTE_LED_VER) {
>> +			pr_warn("This device AUDIO_MUTE LED doesn't support now.\n");
> 
> Both of these warnings have the same grammar flaws and need to be
> rephrased.
> 
>> +			return 0;
>> +		}
>>   
>>   		wpriv->cdev[led_type].name = "platform::mute";
>>   		wpriv->cdev[led_type].brightness_set_blocking = &lsh_wmi_audiomute_led_set;
>> @@ -152,6 +161,9 @@ static int lenovo_super_hotkey_wmi_led_init(enum mute_led_type led_type, struct
>>   		return -EINVAL;
>>   	}
>>   
>> +	wpriv->cdev[led_type].max_brightness = LED_ON;
>> +	wpriv->cdev[led_type].flags = LED_CORE_SUSPENDRESUME;
>> +
>>   	err = devm_led_classdev_register(dev, &wpriv->cdev[led_type]);
>>   	if (err < 0) {
>>   		dev_err(dev, "Could not register mute LED %d : %d\n", led_type, err);
>>
>