[alsa-devel] [PATCH] ASoC: nau8825: add programmable biquad filter control

[Mark Brown]

On Tue, May 31, 2016 at 11:57:41AM +0800, John Hsu wrote:

> +	if (!component->regmap)
> +		return -EINVAL;

> +	regmap_raw_read(component->regmap, NAU8825_REG_BIQ_COF1,
> +		ucontrol->value.bytes.data, params->max);
> +	return 0;

You should really check the return code from regmap, especially for
larger block transfers where some controllers may have limitations.
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