[alsa-devel] [PATCH 13/19] ASoC: Intel: mrfld: add bytes control for modules

[Lars-Peter Clausen]

On 06/13/2014 02:34 PM, Vinod Koul wrote:
[...]
> +
> +static int sst_algo_bytes_ctl_info(struct snd_kcontrol *kcontrol,
> +			    struct snd_ctl_elem_info *uinfo)
> +{
> +	struct sst_algo_control *bc = (void *)kcontrol->private_value;
> +	struct snd_soc_platform *platform = snd_kcontrol_chip(kcontrol);

This won't work in asoc/for-next. Use snd_soc_kcontrol_platform(kcontrol).

> +
> +	uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
> +	uinfo->count = bc->max;
> +
> +	/* allocate space to cache the algo parameters in the driver */
> +	if (bc->params == NULL) {
> +		bc->params = devm_kzalloc(platform->dev, bc->max, GFP_KERNEL);
> +		if (bc->params == NULL) {
> +			pr_err("kzalloc failed\n");
> +			return -ENOMEM;
> +		}
> +	}
> +	return 0;
> +}
> +
> +static int sst_algo_control_get(struct snd_kcontrol *kcontrol,
> +				struct snd_ctl_elem_value *ucontrol)
> +{
[...]
> +}
> +
> +static int sst_algo_control_set(struct snd_kcontrol *kcontrol,
> +				struct snd_ctl_elem_value *ucontrol)
> +{
[...]
> +}

You probably want some kind of locking around the put and get handlers.

> +
> +static const struct snd_kcontrol_new sst_algo_controls[] = {
> +	SST_ALGO_KCONTROL_BYTES("media_loop1_out", "fir", 272, SST_MODULE_ID_FIR_24,
> +		 SST_PATH_INDEX_MEDIA_LOOP1_OUT, 0, SST_TASK_SBA, SBA_VB_SET_FIR),
> +	SST_ALGO_KCONTROL_BYTES("media_loop1_out", "iir", 300, SST_MODULE_ID_IIR_24,
> +		SST_PATH_INDEX_MEDIA_LOOP1_OUT, 0, SST_TASK_SBA, SBA_VB_SET_IIR),
> +	SST_ALGO_KCONTROL_BYTES("media_loop1_out", "mdrp", 286, SST_MODULE_ID_MDRP,
> +		SST_PATH_INDEX_MEDIA_LOOP1_OUT, 0, SST_TASK_SBA, SBA_SET_MDRP),
> +	SST_ALGO_KCONTROL_BYTES("media_loop2_out", "fir", 272, SST_MODULE_ID_FIR_24,
> +		SST_PATH_INDEX_MEDIA_LOOP2_OUT, 0, SST_TASK_SBA, SBA_VB_SET_FIR),
> +	SST_ALGO_KCONTROL_BYTES("media_loop2_out", "iir", 300, SST_MODULE_ID_IIR_24,
> +		SST_PATH_INDEX_MEDIA_LOOP2_OUT, 0, SST_TASK_SBA, SBA_VB_SET_IIR),
> +	SST_ALGO_KCONTROL_BYTES("media_loop2_out", "mdrp", 286, SST_MODULE_ID_MDRP,
> +		SST_PATH_INDEX_MEDIA_LOOP2_OUT, 0, SST_TASK_SBA, SBA_SET_MDRP),
> +	SST_ALGO_KCONTROL_BYTES("sprot_loop_out", "lpro", 192, SST_MODULE_ID_SPROT,
> +		SST_PATH_INDEX_SPROT_LOOP_OUT, 0, SST_TASK_SBA, SBA_VB_LPRO),
> +	SST_ALGO_KCONTROL_BYTES("codec_in0", "dcr", 52, SST_MODULE_ID_FILT_DCR,
> +		SST_PATH_INDEX_CODEC_IN0, 0, SST_TASK_SBA, SBA_VB_SET_IIR),
> +	SST_ALGO_KCONTROL_BYTES("codec_in1", "dcr", 52, SST_MODULE_ID_FILT_DCR,
> +		SST_PATH_INDEX_CODEC_IN1, 0, SST_TASK_SBA, SBA_VB_SET_IIR),


You are creating a lot of global non-const variables here that are later 
modified in the put and get handlers and also elsewhere.

> +
> +};