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Date: Tue, 25 Aug 2020 11:23:11 +0530 From: Sameer Pujar <spujar@...dia.com> To: Kuninori Morimoto <kuninori.morimoto.gx@...esas.com> CC: <broonie@...nel.org>, <perex@...ex.cz>, <tiwai@...e.com>, <robh+dt@...nel.org>, <lgirdwood@...il.com>, <thierry.reding@...il.com>, <jonathanh@...dia.com>, <alsa-devel@...a-project.org>, <linux-tegra@...r.kernel.org>, <linux-kernel@...r.kernel.org>, <sharadg@...dia.com>, <mkumard@...dia.com>, <viswanathl@...dia.com>, <rlokhande@...dia.com>, <dramesh@...dia.com>, <atalambedu@...dia.com>, <nwartikar@...dia.com>, <swarren@...dia.com>, <nicoleotsuka@...il.com> Subject: Re: [PATCH v2 3/9] ASoC: audio-graph: Identify 'no_pcm' DAI links for DPCM Hi Morimoto-san, >>> Yes, I'm posting fixup patch. >>> >>> https://patchwork.kernel.org/patch/11719919/ >> Just curious that why snd_soc_find_dai() itself cannot be protected, >> instead of leaving this to callers. > Because, snd_soc_find_dai() is called both with/without client_mutex. > (same/sof are calling it with mutex, simple-card/audio-graph are calling without mutex) > > Other solution is create both snd_soc_find_dai_with_mutex()/without_mutex(). > I'm not sure which style is best. I don't know how complex it is to have a unified solution. But if we can protect snd_soc_find_dai() itself, things would be simpler may be in long term. Right now there are separate source files for soc-core, soc-dai and soc-component, but because of two approaches looks like the function need to be moved around and need to be placed in soc-core. Also the issue might go unnoticed if LOCKDEP is not enabled. May be start with a wrapper for now and eventually unify? Thanks, Sameer.
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