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

[Takashi Iwai]

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