linux-kernel - RE: [PATCH 2/4] ASoC: simple-card: dynamically allocate the DAI link array

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Date:	Mon, 24 Feb 2014 03:32:02 +0000
From:	"Li.Xiubo@...escale.com" <Li.Xiubo@...escale.com>
To:	Jean-Francois Moine <moinejf@...e.fr>,
	Mark Brown <broonie@...nel.org>
CC:	"alsa-devel@...a-project.org" <alsa-devel@...a-project.org>,
	"Kuninori Morimoto" <kuninori.morimoto.gx@...esas.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH 2/4] ASoC: simple-card: dynamically allocate the DAI
 link array



> @@ -20,7 +20,6 @@ struct simple_card_data {
>  	unsigned int daifmt;
>  	struct asoc_simple_dai cpu_dai;
>  	struct asoc_simple_dai codec_dai;
> -	struct snd_soc_dai_link snd_link;
>  };
> 
>  static int __asoc_simple_card_dai_init(struct snd_soc_dai *dai,
> @@ -246,7 +245,9 @@ static int asoc_simple_card_probe(struct platform_device
> *pdev)
>  	struct device *dev = &pdev->dev;
>  	int ret;
> 
> -	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
> +	priv = devm_kzalloc(dev,
> +			sizeof(*priv) + sizeof(*dai_link),

This is okey for me.

Well, how about splitting the *priv and *dai_link into two separated
memory blocks? As we can get the dai-link pointer via priv->snd_card.dai_link
in other places.

IMHO, then the code will be much more simplifier and readable.

Just for one suggestion.

Thanks,

--
Best regards,
Xiubo


> +			GFP_KERNEL);
>  	if (!priv)
>  		return -ENOMEM;
> 
> @@ -255,7 +256,7 @@ static int asoc_simple_card_probe(struct platform_device
> *pdev)
>  	 */
>  	priv->snd_card.owner = THIS_MODULE;
>  	priv->snd_card.dev = dev;
> -	dai_link = &priv->snd_link;
> +	dai_link = (struct snd_soc_dai_link *) (priv + 1);
>  	priv->snd_card.dai_link = dai_link;
>  	priv->snd_card.num_links = 1;
> 
> --
> 1.9.0
> 
> 

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