linux-kernel - Re: [PATCH V2] ASoC: soc-core: Prevent warning if no DMI table is present

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Date:   Wed, 10 Mar 2021 10:41:18 -0600
From:   Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
To:     Takashi Iwai <tiwai@...e.de>, Mark Brown <broonie@...nel.org>
Cc:     alsa-devel@...a-project.org,
        Kai Vehmanen <kai.vehmanen@...ux.intel.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        linux-kernel@...r.kernel.org, Takashi Iwai <tiwai@...e.com>,
        Ranjani Sridharan <ranjani.sridharan@...ux.intel.com>,
        linux-tegra@...r.kernel.org, Jon Hunter <jonathanh@...dia.com>,
        Bard liao <yung-chuan.liao@...ux.intel.com>
Subject: Re: [PATCH V2] ASoC: soc-core: Prevent warning if no DMI table is
 present



On 3/10/21 10:37 AM, Takashi Iwai wrote:
> On Wed, 10 Mar 2021 17:18:14 +0100,
> Mark Brown wrote:
>>
>> On Wed, Mar 10, 2021 at 09:44:07AM -0600, Pierre-Louis Bossart wrote:
>>> On 3/10/21 7:35 AM, Mark Brown wrote:
>>
>>>> Just change it to a system level check for ACPI, checking for OF would
>>>> leave problems for board files or any other alternative firmware
>>>> interfaces.
>>
>>> did you mean if (!IS_ENABLED(CONFIG_ACPI)) ?
>>
>> Is there a runtime check?
> 
> Well, basically both DMI and ACPI are completely different things, so
> I don't think it's right to check the availability of ACPI as a signal
> of the availability of DMI.

would this work?

if (!IS_ENABLED(CONFIG_DMI))
     return 0;