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Subject: Re: [PATCH v2 10/12] ASoC: SOF: Intel: hda: make sure DAI widget is
 set up before IPC
To:     =?UTF-8?Q?P=c3=a9ter_Ujfalusi?= <peter.ujfalusi@linux.intel.com>,
        Daniel Baluta <daniel.baluta@oss.nxp.com>, broonie@kernel.org
Cc:     alsa-devel@alsa-project.org, kai.vehmanen@linux.intel.com,
        lgirdwood@gmail.com, linux-kernel@vger.kernel.org,
        ranjani.sridharan@linux.intel.com,
        Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>,
        daniel.baluta@nxp.com
References: <20210917143659.401102-1-daniel.baluta@oss.nxp.com>
 <20210917143659.401102-11-daniel.baluta@oss.nxp.com>
 <203bf6cd-6407-f01d-52c3-e399d06cb3f6@linux.intel.com>
From:   Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Message-ID: <b90eff84-b56c-7764-a5bb-f1e07db57cc3@linux.intel.com>
Date:   Thu, 23 Sep 2021 07:58:36 -0500
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>> +static struct sof_ipc_dai_config *hda_dai_update_config(struct snd_soc_dapm_widget *w,
>> +							int channel)
>>  {
>> +	struct snd_sof_widget *swidget = w->dobj.private;
>>  	struct sof_ipc_dai_config *config;
>>  	struct snd_sof_dai *sof_dai;
>> -	struct sof_ipc_reply reply;
>> -	int ret = 0;
>>  
>> -	list_for_each_entry(sof_dai, &hda_stream->sdev->dai_list, list) {
>> -		if (!sof_dai->cpu_dai_name)
>> -			continue;
>> +	if (!swidget) {
>> +		dev_err(swidget->scomp->dev, "error: No private data for widget %s\n", w->name);
> 
> NULL pointer dereference, just return NULL without the print. The caller
> is printing anyways.

yes good catch, we need a v3 with the fixes suggested by Peter in
https://github.com/thesofproject/linux/pull/3171/ applied.