Re: [PATCH v2] cxl/hdm: allow zero sized committed decoders

[Gregory Price <gourry@gourry.net>]

On Fri, Oct 03, 2025 at 12:59:07AM +0000, Vishal Aslot wrote:
> 
> diff --git a/drivers/cxl/core/hdm.c b/drivers/cxl/core/hdm.c
> index e9e1d555cec6..50164fd1b434 100644
> --- a/drivers/cxl/core/hdm.c
> +++ b/drivers/cxl/core/hdm.c
> @@ -1047,10 +1047,10 @@ static int init_hdm_decoder(struct cxl_port *port, struct cxl_decoder *cxld,
>                 }
> 
> +               port->commit_end = cxld->id;
> +

Went looking to understand what commit_end actually does here, can you
help explain?

>                 if (size == 0) {
> -                       dev_warn(&port->dev,
> +                       dev_dbg(&port->dev,
>                                  "decoder%d.%d: Committed with zero size\n",
>                                  port->id, cxld->id);
> -                       return -ENXIO;
> +                       return -ENOSPC;
>                 }
> -               port->commit_end = cxld->id;
>         } else {
> @@ -1210,6 +1210,9 @@ int devm_cxl_enumerate_decoders(struct cxl_hdm *cxlhdm,
>                 rc = init_hdm_decoder(port, cxld, target_map, hdm, i,
>                                       &dpa_base, info);
>                 if (rc) {
> +                       if (rc == -ENOSPC) {
> +                               continue;
> +                       }

Don't need brackets here

>                         dev_warn(&port->dev,
>                                  "Failed to initialize decoder%d.%d\n",
>                                  port->id, i);
> --
> 2.34.1