[PATCH v8 1/4] coresight: cti: Convert trigger usage fields to dynamic bitmaps and arrays

[Leo Yan]

On Sun, Apr 26, 2026 at 05:44:38PM +0800, Yingchao Deng wrote:

[...]

> @@ -316,23 +316,33 @@ static int cti_plat_process_filter_sigs(struct cti_drvdata *drvdata,
>  {
>  	struct cti_trig_grp *tg = NULL;
>  	int err = 0, nr_filter_sigs;
> +	int nr_trigs = drvdata->config.nr_trig_max;
>  
>  	nr_filter_sigs = cti_plat_count_sig_elements(fwnode,
>  						     CTI_DT_FILTER_OUT_SIGS);
>  	if (nr_filter_sigs == 0)
>  		return 0;
>  
> -	if (nr_filter_sigs > drvdata->config.nr_trig_max)
> +	if (nr_filter_sigs > nr_trigs)
>  		return -EINVAL;
>  
>  	tg = kzalloc_obj(*tg);
>  	if (!tg)
>  		return -ENOMEM;
>  
> +	tg->used_mask = bitmap_zalloc(nr_trigs, GFP_KERNEL);

Here would be:

  tg->used_mask = bitmap_zalloc(nr_filter_sigs, GFP_KERNEL);

> +	if (!tg->used_mask) {
> +		kfree(tg);
> +		return -ENOMEM;
> +	}
> +

It is likely this will have merge conflict with the new patch [1].

You might need to rebase this patch on the top of [1]. We need to
give [1] priority as it is a fix.

[1] https://lore.kernel.org/linux-arm-kernel/20260426-nr_sigs-v1-1-3b9df99dab97@oss.qualcomm.com/

Otherwise, LGTM:

Reviewed-by: Leo Yan <leo.yan at arm.com>