linux-kernel - Re: [PATCH v5 04/15] soundwire: Add MIPI DisCo property helpers

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Message-ID: <s5hbmj5kzyu.wl-tiwai@suse.de>
Date:   Mon, 11 Dec 2017 17:10:17 +0100
From:   Takashi Iwai <tiwai@...e.de>
To:     Vinod Koul <vinod.koul@...el.com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        LKML <linux-kernel@...r.kernel.org>,
        ALSA <alsa-devel@...a-project.org>, Mark <broonie@...nel.org>,
        Pierre <pierre-louis.bossart@...ux.intel.com>,
        patches.audio@...el.com, alan@...ux.intel.com,
        Charles Keepax <ckeepax@...nsource.cirrus.com>,
        Sagar Dharia <sdharia@...eaurora.org>,
        srinivas.kandagatla@...aro.org, plai@...eaurora.org,
        Sudheer Papothi <spapothi@...eaurora.org>
Subject: Re: [PATCH v5 04/15] soundwire: Add MIPI DisCo property helpers

On Wed, 06 Dec 2017 16:47:00 +0100,
Vinod Koul wrote:
> 
> +static int sdw_slave_read_dpn(struct sdw_slave *slave,
> +		struct sdw_dpn_prop *dpn, int count, int ports, char *type)
> +{
....
> +		nval = fwnode_property_read_u32_array(node,
> +				"mipi-sdw-port-wordlength-configs", NULL, 0);
> +		if (nval > 0)
> +			dpn[i].num_words = nval;
> +
> +		if (dpn[i].num_words) {
> +			dpn[i].words = devm_kcalloc(&slave->dev, nval,
> +				sizeof(*dpn[i].words), GFP_KERNEL);

Inconsistent checks here: nval or dpn[i].num_words.


> +		nval = fwnode_property_read_u32_array(node,
> +				"mipi-sdw-channel-number-list", NULL, 0);
> +		if (nval > 0)
> +			dpn[i].num_ch = nval;
> +
> +		if (dpn[i].num_ch) {
> +			dpn[i].ch = devm_kcalloc(&slave->dev, nval,
> +					sizeof(*dpn[i].ch), GFP_KERNEL);

Ditto.


> +		nval = fwnode_property_read_u32_array(node,
> +				"mipi-sdw-channel-combination-list", NULL, 0);
> +		if (nval > 0)
> +			dpn[i].num_ch_combinations = nval;
> +
> +		if (dpn[i].num_ch_combinations) {
> +			dpn[i].ch_combinations = devm_kcalloc(&slave->dev,
> +					nval, sizeof(*dpn[i].ch_combinations),
> +					GFP_KERNEL);

Ditto.

> +		/* TODO: Read audio mode */
> +
> +		i++;
> +	}

Don't we use count argument for a sanity check?


Takashi