Re: [PATCH 09/10] pmdomain: renesas: rcar-gen4-sysc: Use scoped device node handling to simplify error paths

From: Geert Uytterhoeven
Date: Tue Aug 27 2024 - 03:48:41 EST


Hi Krzysztof,

On Fri, Aug 23, 2024 at 2:51 PM Krzysztof Kozlowski
<krzysztof.kozlowski@xxxxxxxxxx> wrote:
> Obtain the device node reference with scoped/cleanup.h to reduce error
> handling and make the code a bit simpler.
>
> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx>

Thanks for your patch!

> --- a/drivers/pmdomain/renesas/rcar-gen4-sysc.c
> +++ b/drivers/pmdomain/renesas/rcar-gen4-sysc.c
> @@ -303,12 +304,12 @@ static int __init rcar_gen4_sysc_pd_init(void)
> const struct rcar_gen4_sysc_info *info;
> const struct of_device_id *match;
> struct rcar_gen4_pm_domains *domains;
> - struct device_node *np;
> void __iomem *base;
> unsigned int i;
> int error;
>
> - np = of_find_matching_node_and_match(NULL, rcar_gen4_sysc_matches, &match);
> + struct device_node *np __free(device_node) =
> + of_find_matching_node_and_match(NULL, rcar_gen4_sysc_matches, &match);

This breaks the declarations/blank-line/code structure, so please move
this up.

If you insist on keeping assignment to and validation of np together,
the line should be split in declaration and assignment.

> if (!np)
> return -ENODEV;
>

> @@ -369,14 +365,12 @@ static int __init rcar_gen4_sysc_pd_init(void)
> if (error) {
> pr_warn("Failed to add PM subdomain %s to parent %u\n",
> area->name, area->parent);
> - goto out_put;
> + return error;
> }
> }
>
> error = of_genpd_add_provider_onecell(np, &domains->onecell_data);
>
> -out_put:
> - of_node_put(np);
> return error;

return of_genpd_add_provider_onecell(...);

> }
> early_initcall(rcar_gen4_sysc_pd_init);

Gr{oetje,eeting}s,

Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds