linux-kernel - Re: [PATCH 1/2] ASoC: rockchip: Add machine driver for max98090 codec

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Message-ID: <20150717180402.GS11162@sirena.org.uk>
Date:	Fri, 17 Jul 2015 19:04:02 +0100
From:	Mark Brown <broonie@...nel.org>
To:	Xing Zheng <zhengxing@...k-chips.com>
Cc:	dgreid@...omium.org, dianders@...omium.org, heiko@...ech.de,
	sonnyrao@...omium.org, linux-rockchip@...ts.infradead.org,
	Liam Girdwood <lgirdwood@...il.com>,
	Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.de>,
	linux-kernel@...r.kernel.org, alsa-devel@...a-project.org,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 1/2] ASoC: rockchip: Add machine driver for max98090 codec

On Wed, Jul 15, 2015 at 11:15:42AM +0800, Xing Zheng wrote:

This looks pretty good, a couple of minor points below which should be
quick to fix.

> +static int rk_init(struct snd_soc_pcm_runtime *runtime)
> +{
> +	struct snd_soc_card *card = runtime->card;
> +
> +	card->dapm.idle_bias_off = true;

You shouldn't need to do this?  If you do need to do it we should make
it possible to do it from the card struct.

> +	ret = snd_soc_register_card(card);
> +	if (ret) {
> +		pr_err("snd_soc_register_card failed %d\n", ret);
> +		return ret;
> +	}
> +
> +	ret = snd_soc_of_parse_card_name(card, "rockchip,model");
> +	if (ret)
> +		return ret;

This should be devm_snd_soc_register_card() and you need to parse the
card name before registering it, otherwise the card might instantiate
before the name is set.

> +static int snd_rk_mc_remove(struct platform_device *pdev)
> +{
> +	struct snd_soc_card *soc_card = platform_get_drvdata(pdev);
> +
> +	snd_soc_card_set_drvdata(soc_card, NULL);
> +	snd_soc_unregister_card(soc_card);
> +	platform_set_drvdata(pdev, NULL);

No need for any of the _set_drvdata() calls, the core does them and they
shouldn't make any difference anyway.

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