linux-kernel - Re: [PATCH RESEND 09/13] platform/chrome: cros_ec

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Message-ID: <10885390-8fc4-f21b-4f54-ef66572fc8d2@collabora.com>
Date:   Fri, 23 Jun 2017 09:35:06 +0200
From:   Thierry Escande <thierry.escande@...labora.com>
To:     Benson Leung <bleung@...gle.com>,
        Enric Balletbo i Serra <enric.balletbo@...labora.com>
Cc:     olof@...om.net, bleung@...omium.org, linux-kernel@...r.kernel.org,
        lee.jones@...aro.org, Gwendal Grignou <gwendal@...omium.org>
Subject: Re: [PATCH RESEND 09/13] platform/chrome: cros_ec_lpc: Add MKBP
 events support over ACPI

Hi Benson,

On 22/06/2017 21:35, Benson Leung wrote:

<snip>

>> +	adev = ACPI_COMPANION(dev);
>> +	if (adev) {
>> +		status = acpi_install_notify_handler(adev->handle,
>> +						     ACPI_ALL_NOTIFY,
> 
> Is there a reason you're using ACPI_ALL_NOTIFY here instead of
> ACPI_SYSTEM_NOTIFY that is done in the CHROMIUM version of this?
> 
In the original patch 
(https://chromium-review.googlesource.com/c/358155/) ACPI_ALL_NOTIFY is 
passed to acpi_install_notify_handler() and ACPI_SYSTEM_NOTIFY to 
acpi_remove_notify_handler. I changed it for remove_notify call to 
unsure all handler references were removed.

Regards,
  Thierry

>> +						     cros_ec_lpc_acpi_notify,
>> +						     ec_dev);
>> +		if (ACPI_FAILURE(status))
>> +			dev_warn(dev, "Failed to register notifier %08x\n",
>> +				 status);
>> +	}
>> +
>>   	return 0;
>>   }
>>   
>>   static int cros_ec_lpc_remove(struct platform_device *pdev)
>>   {
>>   	struct cros_ec_device *ec_dev;
>> +	struct acpi_device *adev;
>> +
>> +	adev = ACPI_COMPANION(&pdev->dev);
>> +	if (adev)
>> +		acpi_remove_notify_handler(adev->handle, ACPI_ALL_NOTIFY,
>> +					   cros_ec_lpc_acpi_notify);
>>   
>>   	ec_dev = platform_get_drvdata(pdev);
>>   	cros_ec_remove(ec_dev);
>> -- 
>> 2.9.3
>>
>