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Mon, 29 Jun 2020 17:19:20 +0000 Subject: Re: [PATCH v4 15/23] ASoC: soc-core: Identify 'no_pcm' DAI links for DPCM To: Kuninori Morimoto References: <1593233625-14961-1-git-send-email-spujar@nvidia.com> <1593233625-14961-16-git-send-email-spujar@nvidia.com> <87366e1wkb.wl-kuninori.morimoto.gx@renesas.com> From: Sameer Pujar Message-ID: <83b6cee2-8254-477c-cb65-7e05a9fdbacf@nvidia.com> Date: Mon, 29 Jun 2020 22:49:16 +0530 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.9.0 MIME-Version: 1.0 In-Reply-To: <87366e1wkb.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=1593451119; bh=vfUlacqPqumAcLV/c3aep1ECOFfwdUJzoe5RzrENPw0=; h=X-PGP-Universal:CC:Subject:To: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=VnC8bHc+ovxigL9GkP1gqYfnwMTUuwzT7kfV2xUkvtLMZAFOCjDe59+nUsfk2zS2q fOANMD+Nf7NfUfBAD8FJlNyEh/2ZvHQ4R8UlGsxrWYsZrzVx2XCnqBsSVb7OOB/vqF 6z/hGWZGIVqJCOJmx2ameHksjLhCaKPeJ4L4T6oAaLUbh1RarDm8UIuXB9BEI4YJKq NCPvT8V3c2m4rdYtX4/Z/jpq+z8XztvzNJGI45B3LAJl4KichbWOFWEfFo5tdUOmew wX4YoyUEBzqbFJPG0kVQxrQoZ40OJmtBkA7QICsXowl9CkuLQO3Ez7M969NB6KkPfR dR8unv5kxhjTw== Cc: jonathanh@nvidia.com, nicoleotsuka@gmail.com, alsa-devel@alsa-project.org, atalambedu@nvidia.com, swarren@nvidia.com, linux-kernel@vger.kernel.org, spujar@nvidia.com, nwartikar@nvidia.com, lgirdwood@gmail.com, robh+dt@kernel.org, tiwai@suse.com, viswanathl@nvidia.com, sharadg@nvidia.com, broonie@kernel.org, thierry.reding@gmail.com, linux-tegra@vger.kernel.org, digetx@gmail.com, rlokhande@nvidia.com, mkumard@nvidia.com, dramesh@nvidia.com X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" On 6/29/2020 7:08 AM, Kuninori Morimoto wrote: > External email: Use caution opening links or attachments > > > Hi Sameer > >> PCM devices are created for dai links with 'no-pcm' flag as '0'. >> Such DAI links have CPU component which implement pcm_construct() >> and pcm_destruct() callbacks. Based on this, current patch exposes >> a helper function to identify such components and populate 'no_pcm' >> flag for DPCM DAI link. > (snip) >> +bool soc_component_is_pcm(struct snd_soc_dai_link_component *dlc) >> +{ >> + struct snd_soc_component *component; >> + struct snd_soc_dai *dai; >> + >> + for_each_component(component) { >> + if (!component->driver) >> + continue; >> + >> + for_each_component_dais(component, dai) { >> + if (!dai->name || !dlc->dai_name) >> + continue; >> + >> + if (strcmp(dai->name, dlc->dai_name)) >> + continue; > > We can/should NULL poinster check for "dlc->dai_name" on top of > this function instead of inside loop ? > And then, we can remove "dai->name" check because next strcmp() > automatically fail if dai->name was NULL. Sounds good, will update. > > Thank you for your help !! > > Best regards > --- > Kuninori Morimoto