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Date:   Thu, 6 Jul 2023 09:25:26 +0200
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Subject: Re: [PATCH 7/8] ASoC: topology: suppress probe deferral errors
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To:     Johan Hovold <johan@kernel.org>
Cc:     Johan Hovold <johan+linaro@kernel.org>,
        Mark Brown <broonie@kernel.org>, Vinod Koul <vkoul@kernel.org>,
        Bard Liao <yung-chuan.liao@linux.intel.com>,
        Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>,
        Sanyog Kale <sanyog.r.kale@intel.com>,
        Srinivas Kandagatla <srinivas.kandagatla@linaro.org>,
        Banajit Goswami <bgoswami@quicinc.com>,
        Liam Girdwood <lgirdwood@gmail.com>,
        Jaroslav Kysela <perex@perex.cz>,
        Takashi Iwai <tiwai@suse.com>, alsa-devel@alsa-project.org,
        linux-kernel@vger.kernel.org, Alex Elder <elder@linaro.org>
References: <20230705123018.30903-1-johan+linaro@kernel.org>
 <20230705123018.30903-8-johan+linaro@kernel.org>
 <ac232872-734f-d192-d46c-555ebe3625c5@linux.intel.com>
 <ZKZbzctgLpV-67hJ@hovoldconsulting.com>
From:   =?UTF-8?Q?Amadeusz_S=c5=82awi=c5=84ski?= 
        <amadeuszx.slawinski@linux.intel.com>
In-Reply-To: <ZKZbzctgLpV-67hJ@hovoldconsulting.com>
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On 7/6/2023 8:14 AM, Johan Hovold wrote:
> On Wed, Jul 05, 2023 at 05:07:22PM +0200, Amadeusz Sławiński wrote:
>> On 7/5/2023 2:30 PM, Johan Hovold wrote:
>>> Suppress probe deferral error messages when loading topologies and
>>> creating frontend links to avoid spamming the logs when a component has
>>> not yet been registered:
>>>
>>>       snd-sc8280xp sound: ASoC: adding FE link failed
>>>       snd-sc8280xp sound: ASoC: topology: could not load header: -517
>>>
>>> Note that dev_err_probe() is not used as the topology component can be
>>> probed and removed while the underlying platform device remains bound to
>>> its driver.
>>
>> I'm not sure that I understand that argument... what's wrong with
>> dev_err_probe(tplg->dev, err, "ASoC: adding FE link failed\n");
>> instead of
>> dev_err(tplg->dev, "ASoC: adding FE link failed\n");
>> ?
> 
> In short, it is not correct to use dev_err_probe() here as this is not a
> probe function.
> 
> dev_err_probe() is tied to driver core and will specifically allocate
> and associate an error message with the struct device on probe
> deferrals, which is later freed when the struct device is bound to a
> driver (or released).
> 

I guess you mean call to: device_set_deferred_probe_reason(dev, &vaf);
perhaps functionality could be extended to allow to skip this call and 
just do prints? Or just add separate dev_err_defer function without this 
step, although it would be best if they could share parts of code.