linux-kernel - Re: [PATCH v2] platform/x86: dell-laptop: Implement platform

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Date: Fri, 26 Apr 2024 12:05:36 -0600
From: Lyndon Sanche <lsanche@...deno.ca>
To: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
Cc: mario.limonciello@....com, pali@...nel.org, W_Armin@....de,
	srinivas.pandruvada@...ux.intel.com, Matthew Garrett <mjg59@...f.ucam.org>,
	Hans de Goede <hdegoede@...hat.com>, platform-driver-x86@...r.kernel.org,
	LKML <linux-kernel@...r.kernel.org>, Dell.Client.Kernel@...l.com
Subject: Re: [PATCH v2] platform/x86: dell-laptop: Implement platform_profile



On Fri, Apr 26 2024 at 12:23:00 PM +03:00:00, Ilpo Järvinen 
<ilpo.jarvinen@...ux.intel.com> wrote:
> On Thu, 25 Apr 2024, Lyndon Sanche wrote:
> 
>>  Some Dell laptops support configuration of preset
>>  fan modes through smbios tables.
>> 
>>  If the platform supports these fan modes, set up
>>  platform_profile to change these modes. If not
>>  supported, skip enabling platform_profile.
>> 
>>  Signed-off-by: Lyndon Sanche <lsanche@...deno.ca>
>>  ---
> 
> Two things:
> - You're missing patch version history (put it below the --- line)
> - Don't send updates so soon, give people time to comment. When I saw 
> v1
>   for the first time, you had already posted the next version.
> 
>>  +void thermal_cleanup(void)
>>  +{
>>  +	platform_profile_remove();
>>  +	kfree(thermal_handler);
>>  +}
>>  +
>>   static struct led_classdev mute_led_cdev = {
>>   	.name = "platform::mute",
>>   	.max_brightness = 1,
>>  @@ -2238,6 +2452,12 @@ static int __init dell_init(void)
>>   		goto fail_rfkill;
>>   	}
>> 
>>  +	// Do not fail module if thermal modes not supported,
>>  +	// just skip
>>  +	ret = thermal_init();
>>  +	if (ret)
>>  +		goto fail_thermal;
>>  +
>>   	if (quirks && quirks->touchpad_led)
>>   		touchpad_led_init(&platform_device->dev);
>> 
>>  @@ -2317,6 +2537,8 @@ static int __init dell_init(void)
>>   		led_classdev_unregister(&mute_led_cdev);
>>   fail_led:
>>   	dell_cleanup_rfkill();
>>  +fail_thermal:
>>  +	thermal_cleanup();
>>   fail_rfkill:
>>   	platform_device_del(platform_device);
>>   fail_platform_device2:
>>  @@ -2344,6 +2566,7 @@ static void __exit dell_exit(void)
>>   		platform_device_unregister(platform_device);
>>   		platform_driver_unregister(&platform_driver);
>>   	}
>>  +	thermal_cleanup();
> 
> This is still not right, you'll still platform_profile_remove() even 
> if
> the init side call failed.
> 
> --
>  i.
> 

Thank you for your feedback. I agree with your comments and will add 
more checking on whether certain cleanup actions are necessary.

Lyndon