Received: by 2002:a05:6a10:6006:0:0:0:0 with SMTP id w6csp1802008pxa;
        Sat, 29 Aug 2020 03:57:37 -0700 (PDT)
X-Google-Smtp-Source: ABdhPJzMSm7xU73pLMyIQbUm13zKy7FJeHKf8sZyH1zWNBnms7Hu8upPCCx+MBP74ibMtrtQykbd
X-Received: by 2002:a50:99d6:: with SMTP id n22mr2962983edb.265.1598698656949;
        Sat, 29 Aug 2020 03:57:36 -0700 (PDT)
ARC-Seal: i=1; a=rsa-sha256; t=1598698656; cv=none;
        d=google.com; s=arc-20160816;
        b=eSxLWLPiut4ls3BHHxqlUzOndnh7ua2FYoDbaAiq/GUZGzfkvRDIDMZKtZ95aW6cGT
         zCVDyprVnkIggn/oYr9f9EZS2sMDBEE9zYlbGRA2po7eUVcBd45WfLYNx00rYD21c5z7
         TjPDs55hK3nRESzj5M2FnH+l0bFJDycK4T3l75KBT2wdWpozApboVEgYvJte0SAlH/dS
         eGRbUYiVi9gTR6EdvAIZ9aPeytWTjq8XgQPiV4XWfVKUfy1gMikOupLbrXjxPiRLsEUz
         lZJYimOYWv4anoaUHEt6pAm2lL53BGVqkZxQbIuu2UVhcqQSKEgnjjRRzt/qIri89yOC
         GNSA==
ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816;
        h=list-id:precedence:sender:dkim-signature:content-language
         :content-transfer-encoding:in-reply-to:mime-version:user-agent:date
         :message-id:from:references:cc:to:subject;
        bh=z9YAEWuxCL0ZcZL6/sF4aCg5M+VV5wvIy23653SjDZc=;
        b=QBOO3ewX/HGqzR3rMRoGK+R2Ia8bHzoftAKCeH19U+EtHXPmymdqiOvXuvN9IcchUT
         vA4Hyne9yEE87OrRf3AtkjZzJxOUhAt8K7v7NhlM5ZLvMCrj4cCHc1/hr2Q3SZIeqBDI
         ZtIFUkxmK4l5AnZGOq0d6tpMBHppXw0OkQCGJWMgZ+WXhKxgjwa/+k1cYOedaw3scPId
         FjKp/ECS+UbhJGci9Dh+WoocyAwH3q90111CwZDo7KA843sQuJQVKsN8qcyivKwJfJal
         9ytrF6quRo9NFqiSZFwzWYFoAz75eMBaS+aMxxmDIdreUA/j6kWIhD5TBGIr4gt+m/OF
         cePA==
ARC-Authentication-Results: i=1; mx.google.com;
       dkim=pass header.i=@nvidia.com header.s=n1 header.b=mZbVHOUq;
       spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org;
       dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=nvidia.com
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18])
        by mx.google.com with ESMTP id ck7si1510808ejb.489.2020.08.29.03.57.14;
        Sat, 29 Aug 2020 03:57:36 -0700 (PDT)
Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Authentication-Results: mx.google.com;
       dkim=pass header.i=@nvidia.com header.s=n1 header.b=mZbVHOUq;
       spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org;
       dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=nvidia.com
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S1728064AbgH2K4H (ORCPT <rfc822;yingkeliu@gmail.com> + 99 others);
        Sat, 29 Aug 2020 06:56:07 -0400
Received: from hqnvemgate26.nvidia.com ([216.228.121.65]:15947 "EHLO
        hqnvemgate26.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
        with ESMTP id S1728061AbgH2Kw0 (ORCPT
        <rfc822;linux-kernel@vger.kernel.org>);
        Sat, 29 Aug 2020 06:52:26 -0400
Received: from hqpgpgate102.nvidia.com (Not Verified[216.228.121.13]) by hqnvemgate26.nvidia.com (using TLS: TLSv1.2, DES-CBC3-SHA)
        id <B5f4a33590000>; Sat, 29 Aug 2020 03:52:10 -0700
Received: from hqmail.nvidia.com ([172.20.161.6])
  by hqpgpgate102.nvidia.com (PGP Universal service);
  Sat, 29 Aug 2020 03:52:24 -0700
X-PGP-Universal: processed;
        by hqpgpgate102.nvidia.com on Sat, 29 Aug 2020 03:52:24 -0700
Received: from [10.25.99.248] (10.124.1.5) by HQMAIL107.nvidia.com
 (172.20.187.13) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Sat, 29 Aug
 2020 10:52:14 +0000
Subject: Re: [PATCH v2 3/9] ASoC: audio-graph: Identify 'no_pcm' DAI links for
 DPCM
To:     Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
CC:     <broonie@kernel.org>, <perex@perex.cz>, <tiwai@suse.com>,
        <robh+dt@kernel.org>, <lgirdwood@gmail.com>,
        <thierry.reding@gmail.com>, <jonathanh@nvidia.com>,
        <alsa-devel@alsa-project.org>, <linux-tegra@vger.kernel.org>,
        <linux-kernel@vger.kernel.org>, <sharadg@nvidia.com>,
        <mkumard@nvidia.com>, <viswanathl@nvidia.com>,
        <rlokhande@nvidia.com>, <dramesh@nvidia.com>,
        <atalambedu@nvidia.com>, <nwartikar@nvidia.com>,
        <swarren@nvidia.com>, <nicoleotsuka@gmail.com>
References: <1596605064-27748-1-git-send-email-spujar@nvidia.com>
 <1596605064-27748-4-git-send-email-spujar@nvidia.com>
 <87pn7ofs19.wl-kuninori.morimoto.gx@renesas.com>
 <97f325a6-96cc-11c5-8027-8c0a159e3da0@nvidia.com>
 <2d3aa11e-3c56-1f7a-3d41-2457f973d55b@nvidia.com>
 <87sgcbwcnf.wl-kuninori.morimoto.gx@renesas.com>
 <14691a05-cb29-a030-0e72-eca900d8eb7e@nvidia.com>
 <87o8mzwajg.wl-kuninori.morimoto.gx@renesas.com>
 <e9698ac3-0a2e-08a2-3f78-b0be0069d6ee@nvidia.com>
 <87lfi3w7hj.wl-kuninori.morimoto.gx@renesas.com>
 <f3724be2-c79d-0815-6ff5-460a4f6c10cc@nvidia.com>
 <87eentvwab.wl-kuninori.morimoto.gx@renesas.com>
From:   Sameer Pujar <spujar@nvidia.com>
Message-ID: <6c2bb431-c7d5-53b7-2f62-c1487e321680@nvidia.com>
Date:   Sat, 29 Aug 2020 16:22:09 +0530
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101
 Thunderbird/68.10.0
MIME-Version: 1.0
In-Reply-To: <87eentvwab.wl-kuninori.morimoto.gx@renesas.com>
X-Originating-IP: [10.124.1.5]
X-ClientProxiedBy: HQMAIL105.nvidia.com (172.20.187.12) To
 HQMAIL107.nvidia.com (172.20.187.13)
Content-Type: text/plain; charset="utf-8"; format=flowed
Content-Transfer-Encoding: 7bit
Content-Language: en-GB
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1;
        t=1598698330; bh=z9YAEWuxCL0ZcZL6/sF4aCg5M+VV5wvIy23653SjDZc=;
        h=X-PGP-Universal:Subject:To:CC:References:From:Message-ID:Date:
         User-Agent:MIME-Version:In-Reply-To:X-Originating-IP:
         X-ClientProxiedBy:Content-Type:Content-Transfer-Encoding:
         Content-Language;
        b=mZbVHOUqOGxXut6zWwsgRZ0CUbPiGk7QDGFLrWBAMMepGty8Xh28KLm2rwVEvhpUB
         Q2BwcEzoaFOnzE1pjU7+AH59VEU7ZxQc1I/QGYd/KXXLqbf8YrAue4PhepCWaBKIEz
         cDBpWWb4sB8fp62IRRIHjRoufyO35FyoCKjXDIZsdtQ+VV3ViOf+0cDLzo3cf0FHzg
         BcsOm3uobCfVAvFjrY9/3FnvHMdOblx5ZjpvAmBuV58M5GFYv+IzPlN9cqALNhsw9e
         sx3ui32biKPGCbx7rZhuwEsVUFSS+5PNIdM3vT53hniB9VsNYfod9h97MxB6V+Y8Hn
         f1FFMcjDp6/eg==
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

Hi Morimoto-san,

Sorry for the delayed reply as I was on sick leave.
>> Sure. BTW, there are more such candidates which require 'lock' version
>> of these helpers.
>> For example: soc_find_component(), snd_soc_add/remove_pcm_runtime()
>> and snd_soc_register_dai().
> soc_find_component() is static function, no need to care about mutex.
> other functions are indeed exported function, but is used from
> topology.c which is calling it under mutex.
>
>
I was just thinking if we need to future proof these functions. As you 
mentioned, currently these have limited usage (in topology.c) and should 
just be fine to address snd_soc_find_dai() for now.

Thanks,
Sameer.