linux-kernel - Re: [PATCH v4] ASOC: dapm: add code to configure dai link parameters

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Message-ID: <20140906141634.GF2601@sirena.org.uk>
Date:	Sat, 6 Sep 2014 15:16:34 +0100
From:	Mark Brown <broonie@...nel.org>
To:	Nikesh Oswal <nikesh@...nsource.wolfsonmicro.com>
Cc:	lgirdwood@...il.com, perex@...ex.cz, tiwai@...e.de,
	alsa-devel@...a-project.org, linux-kernel@...r.kernel.org,
	patches@...nsource.wolfsonmicro.com
Subject: Re: [PATCH v4] ASOC: dapm: add code to configure dai link parameters

On Mon, Sep 01, 2014 at 09:56:53AM +0100, Nikesh Oswal wrote:
> dai-link params for codec-codec links were fixed. The fixed
> link between codec and another chip which may be another codec,
> baseband, bluetooth codec etc may require run time configuaration
> changes. This change provides an optional alsa control to select
> one of the params from a list of params.

As I'm fairly sure I've told you several times now please use subject
lines matching the style for the subsystem - if your commit logs look
different to all the other commit logs that's probably not a good sign.
In this specific case "ASOC" and "ASoC" are not the same thing.

> +	for (count = 0 ; count < num_params; count++) {
> +		w_param_text[count] = kmemdup((void *)(config->stream_name),
> +			strlen(config->stream_name) + 1, GFP_KERNEL);
> +		if (!w_param_text[count]) {
> +			ret = -ENOMEM;
> +			goto  outfree_w_param;
> +		}
> +		config++;
> +	}

This will happily create values with a completely empty name if the user
didn't specify one.  This doesn't seem great - it's going to be an easy
mistake to make and fail to notice.  I'd at least expect a warning here.

> +	w_param_enum[0].items = num_params;
> +	w_param_enum[0].texts = (const char * const *) w_param_text;

Why the casts?  This tends to be a sign that something is wrong.

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