linux-kernel - Re: [PATCH 2/2] hwmon: chipcap2: disable sensor if request ready irq fails

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Message-ID: <9659c699-1ce4-4b74-b697-83d926d80b35@gmail.com>
Date: Mon, 12 Aug 2024 21:59:59 +0200
From: Javier Carrasco <javier.carrasco.cruz@...il.com>
To: Guenter Roeck <linux@...ck-us.net>, Jean Delvare <jdelvare@...e.com>
Cc: linux-hwmon@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] hwmon: chipcap2: disable sensor if request ready irq
 fails

On 12/08/2024 18:49, Guenter Roeck wrote:
> On 8/12/24 08:43, Javier Carrasco wrote:
>> This check is carried out after getting the regulator, and the device
>> can be disabled if an error occurs.
>>
> 
> I do not see a possible path for a call to cc2_enable() at this point,
> meaning the regulator won't ever be enabled. Please provide a better
> explanation why this patch would be necessary.
> 
> Guenter
> 

Hi Guenter,

this patch enforces the state where the dedicated regulator is disabled,
no matter what the history of the regulator was. If a previous
regulator_disable() failed, it would still be desirable that the
regulator gets disabled the next time the driver is probed (i.e. a new
attempt to disable it on failure).
cc2_disable() checks first if the regulator is enabled to avoid any
imbalance.

Best regards,
Javier Carrasco