linux-kernel - Re: [PATCH v13 3/8] clk: Use devm_ in the register fixed factor clock

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Date:   Fri, 14 Sep 2018 15:53:02 -0300
From:   Ricardo Salveti <rsalveti@...lveti.net>
To:     ilia.lin@...il.com
Cc:     ilialin@...eaurora.org, mturquette@...libre.com, sboyd@...nel.org,
        robh+dt@...nel.org, mark.rutland@....com, andy.gross@...aro.org,
        david.brown@...aro.org, will.deacon@....com,
        Amit Kucheria <amit.kucheria@...aro.org>,
        linux-clk@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-soc@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v13 3/8] clk: Use devm_ in the register fixed factor clock

On Thu, Jun 14, 2018 at 6:55 PM <ilia.lin@...il.com> wrote:
>
> From: Ilia Lin <ilialin@...eaurora.org>
>
> Use devm_clk_hw_register instead of clk_hw_register
> to simplify the usage of this API. This way drivers that call
> the clk_hw_register_fixed_factor won't need to maintain
> a data structure for further cleanup.
>
> Signed-off-by: Ilia Lin <ilialin@...eaurora.org>
> Tested-by: Amit Kucheria <amit.kucheria@...aro.org>
> ---
>  drivers/clk/clk-fixed-factor.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/clk/clk-fixed-factor.c b/drivers/clk/clk-fixed-factor.c
> index a5d402de5584..8e39bda8e596 100644
> --- a/drivers/clk/clk-fixed-factor.c
> +++ b/drivers/clk/clk-fixed-factor.c
> @@ -94,7 +94,7 @@ struct clk_hw *clk_hw_register_fixed_factor(struct device *dev,
>         init.num_parents = 1;
>
>         hw = &fix->hw;
> -       ret = clk_hw_register(dev, hw);
> +       ret = devm_clk_hw_register(dev, hw);

Not sure what is the current state of this patch-set, but this change
breaks drivers calling clk_hw_register_fixed_factor with a NULL dev
(e.g. imx_clk_fixed_factor), as devm_clk_hw_register needs a valid dev
for devres_add to work.

>         if (ret) {
>                 kfree(fix);
>                 hw = ERR_PTR(ret);
> --
> 2.11.0

Cheers,
-- 
Ricardo Salveti de Araujo