linux-kernel - Re: [PATCH v2] thermal: Fail object registration if thermal class is not registered

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Message-ID: <1dbd4e5b-f5e0-8f06-24b3-67daaf3e2af9@linaro.org>
Date:   Mon, 23 Jan 2023 23:56:19 +0100
From:   Daniel Lezcano <daniel.lezcano@...aro.org>
To:     "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Linux PM <linux-pm@...r.kernel.org>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
        Zhang Rui <rui.zhang@...el.com>
Subject: Re: [PATCH v2] thermal: Fail object registration if thermal class is
 not registered

On 23/01/2023 21:44, Rafael J. Wysocki wrote:
> From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
> 
> If thermal_class is not registered with the driver core, there is no way
> to expose the interfaces used by the thermal control framework, so
> prevent thermal zones and cooling devices from being registered in
> that case by returning an error from object registration functions.
> 
> For this purpose, use a thermal_class pointer that will be NULL if the
> class is not registered.  To avoid wasting memory in that case, allocate
> the thermal class object dynamically and if it fails to register, free
> it and clear the thermal_class pointer to NULL.
> 
> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>

Acked-by: Daniel Lezcano <daniel.lezcano@...aro.org>


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